Answer
(a) The scatter plot is shown in the image. The linear model is appropriate.
(b) $y=0.331x+8.073$. The regression line is shown in the image.
(c) $9.73$ and $12.38$ cents/kWh respectively
Work Step by Step
(a) The points on the table are plotted.
(b) The regression line is found using technology where $m \approx 0.331$ and $b \approx 8.073$.
(c) 5 and 13 are input into the regression line as follows:
$y=0.331(5)+8.073 \approx 9.73$
$y=0.331(13)+8.073 \approx 12.38$
