Part D

To obtain the regression line, you used Best fit on a Linear relationship. But the actual data values do not seem to be quite linear. There's an upward curve. Let's investigate another option.

Remove the Linear relationship and add a Quadratic relationship. Then, choose Best fit. See how this curve fits your data. Export an image of the plot, and paste it in the space below. Comment on the data fit as compared with the best-fit line and record the correlation coefficient value for this quadratic curve.