A sample of twenty automobiles was taken, and the miles per gallon (MPG), horsepower, and total weight were recorded. Develop a linear regression model to predict MPG using horsepower as the only independent variable. Develop another model with weight as the independent variable. Which of these two models is better? Explain.

MPG	HORSEPOWER	WEIGHT
44	67	1,844
44	50	1,998
40	62	1,752
37	69	1,980
37	66	1,797
34	63	2,199
35	90	2,404
32	99	2,611
30	63	3,236
28	91	2,606
26	94	2,580
26	88	2,507
25	124	2,922
22	97	2,434
20	114	3,248
21	102	2,812
18	114	3,382
18	142	3,197
16	153	4,380
16	139	4,036