Question

Using the data below, determine if a heavier car uses more gasoline. If it does, determine the equation for the best fit line. If appropriate, predict the miles per gallon of a car that weighs 37 hundred pounds.

Weight (in hundred pounds)	27	44	32	47	23	40	34	52
Miles per Gallon (mpg)	30	19	24	13	29	17	21	14

Answer 1

x(weight)	y(Miles per gallon)	xy	x2	y2
27	30	810	729	900
44	19	836	1936	361
32	24	768	1024	576
47	13	611	2209	169
23	29	667	529	841
40	17	680	1600	289
34	21	714	1156	441
52	14	728	2704	196
∑Xi=299	∑Yi=167	∑xiyi=5814	∑xi^2=11887	∑Yi^2=3773

For car weight 37 hundred pounds.

miles per gallon of a car is 21.1