Ornithologists, scientists who study birds, tag sparrow hawks in 1313 different colonies to study their population. They gather data for the percent of new sparrow hawks in each colony and the percent of those that have returned from migration.

Percent return: 80; 66; 84; 56; 73; 66; 52; 44; 64; 45; 60; 46; 38 Percent new: 77; 66; 88; 14; 12; 15; 16; 17; 18; 18; 16; 20; 20

Enter the data into your calculator and make a scatter plot. Use your calculator's regression function to find the equation of the least-squares regression line. Add this to your scatter plot.

(a) What is the equation of the least-squares regression line? Use xx to represent percent return. Round any calculated values to twodecimal places.