(3 points) Find the least-squares regression line y = bo + bit through the points (-1, 1), (1, 7), (4, 14), (7, 18), (9, 24), and then use it to find point estimates y corresponding to I = 5 and I = 7. For this problem and to give you practice for the test, use the shortcut method to find bo given that by = 2.17647058823529. For r - 5, y = For T - 7, y =