A baker tracks how much dough remains in the cooler, based on the number of pastries sold. The scatter plot shows the data.

A scatter plot titled Baker has x-axis labeled Pastries Sold and y-axis labeled Dough Remaining (in pounds) and contains ordered pairs 1,5 and 1,8 and 2,4 and 3,5 and 3,6 and 5,6 and 6,4 and 7,2 and 8,3 and 9,1.

Part A: Calculate the equation for a line of fit without technology. Explain where you sketched your line and show all work.

Part B: Use your equation from Part A to predict the number of pastries sold if the baker has 2.5 pounds of dough remaining in the cooler. Show all work.