2 The x argument gives the number of children in a region and y the number of libraries in that region Summary information is below Ex 100 Ey 45 Exy 9950 Ex 7500 Ey 14200 n Add 20 to the last 2 digits of your student number Example n 21 if 01 a Extract and write the linear regression equation using the least squares method 30 points b Calculate and interpret the coefficient that gives the relationship between x and y will be interpreted 10 points