Answer the following question with the "California Test Score" dataset.

Estimate the following regression model:

read_scr = b0 + b1*avginc

What is the predicted change in read_scr when avginc increases from 42 to 43?

read_scr	avginc	avginc^2
691.599976	22.6900005	514.836124
660.5	9.82400036	96.510983
636.299988	8.97799969	80.6044784
651.900024	8.97799969	80.6044784
641.799988	9.08033276	82.452443
605.700012	10.415	108.472224
604.5	6.57700014	43.2569309
605.5	8.17399979	66.8142725
608.900024	7.38500023	54.5382284
611.900024	11.6133327	134.869498
612.799988	8.93099976	79.7627566
616.599976	7.38500023	54.5382284
612.799988	5.33500004	28.4622254
610	8.27900028	68.5418457
611.900024	9.63000011	92.7369022
614.799988	7.454	55.5621159
611.700012	6.21600008	38.638657
614.900024	7.76399994	60.2796951
619.099976	7.02199984	49.3084817
621.299988	5.69899988	32.4785997
615.599976	7.94099998	63.0594808
619.900024	9.63000011	92.7369022
622.900024	7.40500021	54.8340281
620.700012	9.63000011	92.7369022
619.5	8.01900005	64.3043619
625	8.52299976	72.641525
620.400024	7.98318148	63.7311865
616.5	7.30499983	53.3630225
620.099976	8.93400002	79.8163563
627.900024	8.5539999	73.1709143
620.400024	6.61299992	43.7317679
623		#VALUE!
620.799988	8.12661552	66.0418799
626.099976	11.4309998	130.667755
625.400024	11.7222252	137.410563
625.400024	11.3325005	128.425567
623.599976	9.59799957	92.1215958
628.900024	14.5579996	211.935353
624.400024	22.0599995	486.643576
627.5	9.70899963	94.2646739
627.799988	11.4829445	131.858014
621.599976	8.17800045	66.8796914
629.400024	8.17399979	66.8142725
621.099976	7.5	56.25
626.5	10.0504999	101.012549
630.200012	7.33199978	53.7582208
629.5	12.5815773	158.296087
631.900024	15.177	230.34133
631.599976	12.109128	146.630981
628.5	11.7849998	138.886221
628.400024	14.0620003	197.739852
635.700012	10.4720001	109.662787
633	13.405117	179.697163
629.599976	12.3017998	151.334278
634.200012	15.4040709	237.285399
633.5	13.7620001	189.392646
631.400024	14.184	201.185856
637.5	8.86499977	78.5882209
637.299988	12.9969997	168.922002
633.200012	11.592	134.374464
629.200012	8.27900028	68.5418457
630.299988	10.9056425	118.933039
629.599976	13.4006252	179.576757
634.400024	11.0810003	122.788568
634.700012	9.08199978	82.48272
638.400024	13.3900003	179.292109
631.900024	14.6016254	213.207466
637.700012	11.1160002	123.56546
631.5	8.42300034	70.9469347
636.799988	11.665	136.072224
631.799988	7.30499983	53.3630225
637.700012	13.7305994	188.52936
635.5	11.1160002	123.56546
633.200012	10.3644285	107.421379
631.099976	6.9829998	48.7622862
637.799988	14.4678001	209.317241
636.599976	14.6529999	214.710405
644.299988	10.6289997	112.975635
640.900024	9.78100014	95.6679637
634.599976	10.6560001	113.550339
633	11.9379997	142.515837
636.700012	7.38500023	54.5382284
633.200012	10.6759996	113.976968
633.900024	9.97200012	99.4407864
634.700012	8.25800037	68.1945702
645.400024	8.89599991	79.1388144
632.299988	12.0620003	145.491851
632.400024	9.428895	88.9040609
636.200012	8.92033291	79.5723392
636.099976	10.0979996	101.969595
638	11.8299999	139.948898
640.900024	11.5530005	133.471819
644.900024	19.7070007	388.365878
646.099976	7.10500002	50.4810253
633.200012	13.7250004	188.375635
636.700012	10.0979996	101.969595
640.400024	13.7620001	189.392646
636.200012	9.66499996	93.4122243
630.400024	10.2639999	105.349695
638.599976	11.5692005	133.846401
637.5	7.40500021	54.8340281
636.900024	12.0769997	145.853921
640.299988	11.283	127.306089
642.700012	10.0349998	100.701222
639.900024	8.38399982	70.2914531
641.400024	13.6300001	185.776903
641.700012	14.1276674	199.590987
641.5	11.2661247	126.925566
641.400024	13.3900003	179.292109
634.299988	11.9379997	142.515837
643.5	8.25800037	68.1945702
640.400024	14.2267275	202.399775
637.700012	10.4720001	109.662787
638.5	14.2429008	202.860225
644.900024	14.066	197.852356
640.400024	15.9680004	254.977037
639.299988	10.2639999	105.349695
638.599976	10.6024704	112.412379
640.799988	10.5229998	110.733524
638.900024	11.2379999	126.292642
641.799988	10.0559998	101.123131
637	11.1829996	125.05948
640.200012	7.38500023	54.5382284
652.599976	13.5790005	184.389254
642	9.63000011	92.7369022
642.599976	15.2740002	233.295081
639.400024	14.0342503	196.96018
638.900024	10.2396669	104.850779
641.700012	9.48499966	89.9652185
644.200012	15.0298748	225.897137
652.700012	9.78100014	95.6679637
633.599976	13.1920004	174.028874
645.700012	12.2159996	149.230646
652.299988	14.0760002	198.133782
644.5	25.4873333	649.604159
652.099976	14.8669996	221.027678
649.5	9.97200012	99.4407864
643.200012	14.5780001	212.518086
644.299988	7.38500023	54.5382284
646	12.3430004	152.349659
645.299988	12.4313326	154.53803
649.700012	14.9060001	222.18884
642.900024	12.6698999	160.526365
656.799988	10.3330002	106.770893
658	11.9720001	143.328787
647.700012	12.8269997	164.53192
644.799988	10.04	100.801599
644.299988	13.335	177.822226
645.5	9.85400009	97.1013178
652.5	11.4259996	130.553468
650.900024	15.1309996	228.947148
643	14.5780001	212.518086
641.599976	10.2679996	105.431817
647.799988	15.5928574	243.137201
649.099976	11.2379999	126.292642
644	15.0513754	226.543901
645.599976	15.4131765	237.566011
647.799988	11.0810003	122.788568
642.5	10.0979996	101.969595
645	14.2982998	204.441377
650.799988	11.8030005	139.31082
649.400024	9.97200012	99.4407864
651.599976	15.4090004	237.437293
645	15.2937994	233.9003
648	15.5329285	241.271867
648.799988	16.2929993	265.461825
651.599976	12.875	165.765625
643.400024	16.6229992	276.324102
645.099976	12.5498829	157.499561
646	14.2585716	203.306865
655.200012	18.3260002	335.842284
649.799988	12.7491426	162.540638
651.299988	11.4259996	130.553468
652.599976	8.82999992	77.9688987
655.099976	11.1759996	124.902968
654.599976	14.2279997	202.435975
655.400024	15.0270004	225.810742
653.599976	10.5209999	110.691439
651.799988	18.6259995	346.927856
656.099976	22.5289993	507.555811
653.299988	18.2983894	334.831056
651.700012	11.8857498	141.271049
654.400024	9.92599964	98.5254689
662	14.1969995	201.554796
647	9.63000011	92.7369022
654.200012	10.6389999	113.18832
651.900024	14.4750004	209.525636
656.299988	13.467	181.360089
648.200012	9.66499996	93.4122243
656.400024	12.7080002	161.493269
651.599976	17.823	317.659327
655.099976	17.1560001	294.328341
650.900024	19.5896358	383.753833
657.200012	14.1969995	201.554796
660.299988	11.9119997	141.895737
655.200012	13.3859997	179.184987
653.099976	11.5539999	133.494914
656.799988	19.0259991	361.988641
656.099976	16.4069996	269.189635
653.700012	14.0579996	197.627353
652.400024	19.0680008	363.588654
655.599976	20.7700005	431.392919
653.400024	10.2639999	105.349695
654.099976	14.5780001	212.518086
655.5	10.2019997	104.080797
655.900024	12.5019999	156.3
656.599976	13.9060001	193.37684
651.400024	9.98600006	99.7201972
657.799988	13.7119999	188.018941
659.799988	10.0979996	101.969595
655.099976	11.2910004	127.486689
652.700012	13.2250004	174.900635
654.200012	13.6300001	185.776903
653.5	14.6230001	213.832133
662.200012	8.77600002	77.0181764
650	10.3380003	106.87425
657.400024	16.323	266.440328
660.400024	10.656333	113.557432
660.799988	14.5780001	212.518086
655.400024	18.6306	347.099255
653	11.1160002	123.56546
657.599976	14.5976667	213.091874
653.200012	15.493	240.03305
662	16.2719994	264.777963
651.599976	13.6300001	185.776903
662	12.3940001	153.611237
655.900024	15.3310003	235.039571
654.099976	12.6660004	160.427565
657.799988	13.7119999	188.018941
658.700012	17.7803345	316.140294
655.400024	10.5566673	111.443225
661.5	10.5229998	110.733524
663.400024	13.243	175.37705
656.700012	22.4729996	505.03571
657.599976	15.6846542	246.008378
657.299988	23.4837494	551.486485
661	11.6490002	135.699205
664.900024	16.3560009	267.518765
672.799988	14.0740004	198.077486
664.200012	13.4370003	180.552976
659.700012	18.3379993	336.28222
660.200012	11.4259996	130.553468
655.099976	15.749917	248.059886
658.5	15.7790003	248.97685
657	14.0620003	197.739852
664	12.1739998	148.206271
654.700012	12.8999996	166.40999
661.299988	10.9709997	120.362835
654.900024	17.4351997	303.98619
662.099976	14.7600002	217.857607
658.299988	14.6029997	213.2476
662.799988	13.5223331	182.853494
660	16.6690006	277.855582
660.799988	13.5222502	182.85125
660.400024	12.5179996	156.700315
661.700012	18.3260002	335.842284
673.099976	11.4659996	131.469147
659.799988	10.0979996	101.969595
667.799988	15.3649998	236.083218
666.900024	10.3113327	106.323582
662.099976	16.9866257	288.545452
661.099976	9.61200047	92.3905529
662	21.1105003	445.653224
659.099976	16.4733124	271.370021
672.400024	18.3689995	337.420142
660.099976	16.6541119	277.359442
665.400024	18.5442219	343.888165
662.700012	14.1800003	201.072409
664.299988	18.0295544	325.064831
662.5	13.5860004	184.579408
660.400024	12.6400003	159.769609
663.099976	11.1029997	123.276602
651.400024	7.5	56.25
665.400024	15.5059996	240.436023
663.5	22.8414001	521.729561
661.700012	19.8231258	392.956318
669.400024	16.3470001	267.224413
658.299988	16.2929993	265.461825
662.400024	13.2480001	175.509508
667.099976	14.0100002	196.280106
668.299988	14.1630001	200.590572
667.400024	15.7709999	248.724438
664.299988	14.4833326	209.766924
660.200012	14.2089996	201.895671
666.400024	15.1669998	230.037883
659.400024	12.5842505	158.363359
657.700012	10.5509996	111.323593
666.200012	16.9559994	287.505915
668.700012	17.7089996	313.608668
671.299988	16.2719994	264.777963
666.700012	17.9008007	320.438666
674	11.8339996	140.043547
663.400024	18.6201992	346.711818
663.099976	12.4309998	154.529755
665.5	15.1669998	230.037883
663.700012	20.8757496	435.796921
667.599976	10.6389999	113.18832
665.900024	25.0296192	626.481838
666.799988	16.7578011	280.823896
656.200012	15.2969999	233.998207
669.799988	17.3694458	301.697647
663.900024	22.0960007	488.233246
670.299988	22.8419991	521.756921
664.5	18.3198757	335.617846
668	25.0300007	626.500934
668.700012	21.9570007	482.109881
666.900024	18.796833	353.320932
671.900024	10.6389999	113.18832
671	17.5079994	306.530044
668.799988	18.5930004	345.699664
671.200012	11.1160002	123.56546
663.700012	14.0976667	198.744208
672.099976	12.6400003	159.769609
667.5	20.9364281	438.33402
662.099976	14.1800003	201.072409
666.900024	11.8260002	139.854281
671.299988	18.6709995	348.606223
667.700012	17.3320007	300.398249
669.799988	17.5079994	306.530044
672.200012	15.5719995	242.48717
667	15.5672503	242.33928
669.200012	15.7519999	248.125499
669.400024	20.4699993	419.020872
660.5	9.70899963	94.2646739
665.799988	11.1160002	123.56546
672.700012	16.3209991	266.375013
668.799988	21.9669991	482.549047
668.5	8.93400002	79.8163563
666.200012	19.9969997	399.879999
665.5	18.8272305	354.464607
666.099976	18.1186657	328.286047
668.900024	23.6673756	560.144666
680.900024	22.1389999	490.135318
673.299988	20.5459995	422.138097
664.599976	9.48499966	89.9652185
670.099976	11.8339996	140.043547
673.200012	18.7989998	353.402393
669.200012	10.5509996	111.323593
669.200012	15.5190001	240.839363
672.799988	21.6317272	467.931622
671.200012	21.0957508	445.030702
674.599976	15.1669998	230.037883
674.900024	19.1170006	365.459711
671.400024	17.6200008	310.46443
677.599976	15.1669998	230.037883
679.799988	10.6429996	113.273442
668.900024	20.7390556	430.108429
673.099976	21.566	465.092355
679.599976	17.6560001	311.734341
672.299988	17.7089996	313.608668
676.099976	27.816	773.729855
673.900024	18.5930004	345.699664
668.099976	14.2629995	203.433156
674.599976	22.7579994	517.926538
672.700012	12.6400003	159.769609
669.400024	11.2379999	126.292642
676.099976	16.9559994	287.505915
679.099976	17.7089996	313.608668
675	25.6219997	656.486871
676.099976	18.7259998	350.66307
680.5	13.4429998	180.714245
670.5	15.1800003	230.432409
670.5	19.1170006	365.459711
676	13.7119999	188.018941
681	17.5079994	306.530044
683	11.8339996	140.043547
680.099976	13.2729998	176.172523
673.799988	16.3560009	267.518765
673.299988	18.6259995	346.927856
680.5	23.7329998	563.25528
672.799988	12.934	167.288356
679	13.9060001	193.37684
678.5	15.4280005	238.023198
682.900024	15.3809996	236.575148
685.299988	22.5289993	507.555811
679	23.8060989	566.730347
684.099976	24.6030006	605.307641
676.799988	36.1739998	1308.55826
683.099976	33.4550018	1119.23715
678.700012	20.4802227	419.439522
680.200012	20.1340008	405.377987
685.700012	19.3465004	374.287078
684.200012	36.1739998	1308.55826
682.799988	22.8633347	522.732072
680.799988	17.7089996	313.608668
688.5	14.177	200.98733
689.799988	41.0929985	1688.63453
681.799988	21.9570007	482.109881
680	16.0639992	258.05207
685.599976	25.7369995	662.393144
687.299988	20.4740009	419.184714
682.400024	35.8100014	1282.3562
684.5	13.5670004	184.0635
680.400024	20.0890007	403.567949
688.5	18.2830009	334.268124
682.200012	25.2397156	637.043242
686.200012	25.0629997	628.153955
692.200012	30.6285	938.105011
683.099976	27.4752159	754.887489
693.799988	30.8400002	951.105609
691.599976	34.1595001	1166.87145
693.5	43.2299995	1868.83286
687.700012	27.9477501	781.076735
693.700012	49.9389992	2493.90364
695.900024	55.3279991	3061.18749
693.599976	35.480999	1258.90129
697.900024	34.3009987	1176.55851
695.099976	38.6285706	1492.16646
701.299988	35.3419991	1249.0569
697.400024	31.052	964.226707
699.099976	40.2639999	1621.18969
695.400024	35.8100014	1282.3562
693.299988	43.2299995	1868.83286
698.299988	50.6769981	2568.15814
698.900024	40.4020004	1632.32164
700.900024	28.7169991	824.666035
704	41.734108	1741.73577
648.299988	23.7329998	563.25528
667.900024	9.95199966	99.0422973
660.5	12.5019999	156.3