2.92 Price and ounces. In Example 2.2 (page 73) and Check-in question 2.3 (page 74), we examined the relationship between the price and the size of a Mocha Frappuccino. The 12-ounce Tall drink costs $4.75, the 16-ounce Grande is $5.25, and the 24-ounce Venti is $5.75. a. Plot the data and describe the relationship. (Explain why you should plot size in ounces on the x axis.) b. Find the least-squares regression line for predicting the price using size. Add the line to your plot. c. Draw a vertical line from the least- squares line to each data point. This gives a graphical picture of the residuals. d. Find the residuals and verify that they sum to zero