. The dependent variable is MPG and the independent variable is the car weight.

City MPG	Weight
20	3450
23	3320
19	3390
20	3350
18	4230
18	4050
19	3255
14	4935
15	4660
17	4660
18	4210
13	5300
13	5900
26	2760
15	4660
21	3390
18	4315
24	2880
16	4295
15	4965
18	3805
25	2295
17	3640
18	3390
13	5000
18	3925
19	3355
17	4195
20	3340
20	3285
20	3345
15	4270
16	4315
25	3095
28	2805
24	2855
21	3575
17	3590
23	2570
26	2985
19	4120
34	3045
20	3690

Regression Analysis
	r	0.681	n	43
	r	-0.825	k	1
	Std. Error	2.499	Dep. Var.	City MPG
ANOVA table
Source	SS	df	MS	F	p-value
Regression	546.43787944	1	546.43787944	87.51	1.00E-11
Residual	256.02723683	41	6.24456675
Total	802.46511628	42
Regression output				confidence interval
variables	coefficients	std. error	t (df=41)	p-value	95% lower	95% upper
Intercept	36.6337	1.8793	19.493	2.39E-22	32.8383	40.4291
Weight	-0.0046	0.00048708	-9.354	1.00E-11	-0.0055	-0.0036

a.What is the point estimate for₁? Interpret this value.

b.What is the sample regression equation?

c.Predict the MPG for a 4000 lb. vehicle.

d. What is the coefficient of determination?