1.A consumer buying cooperative tested the effective heating area of 20 different

electric space heaters with different wattages. Here are the results.

Heater

Wattage

Area

1

1,460

225

2

650

94

3

1,430

175

4

1,230

134

5

1,310

151

6

1,280

224

7

1,060

119

8

1,980

311

9

1,030

114

10

1,600

234

11

1,270

90

12

460

76

13

540

72

14

1,550

180

15

2,100

258

16

1,410

233

17

740

87

18

1,530

228

19

1,240

146

20

500

29

a. Compute the correlation between the wattage and heating area.

b.Develop the regression equation for effective heating based on wattage.

c. Which heater looks like the "best buy" based on the size of the residual?

The sixth heater is the best buy. It heats an area that is 55.296 square feet larger than estimated by the regression equation.

in this problem where did you get the X1, X1 Y1, and Y1??