use OLS without data transformation to fit the model, i.e., directly regress Y on X, and compare the variances of the coefficients Var( 0) and Var( 1) with their counterparts obtained by using WLS, conclude which method yields smaller variances.

X	Y
294	30
247	32
267	37
358	44
423	47
311	49
450	56
534	62
438	68
697	78
688	80
630	84
709	88
627	97
615	100
999	109
1022	114
1015	117
700	106
850	128
980	130
1025	160
1021	97
1200	180
1250	112
1500	210
1650	135