A report summarizing scores for students on a verbal aptitude test x and a mathematics aptitude test y states that  = 480,  = 500, sx = 80, sy = 120, and r = 0.60.
a. Find the slope of the regression line, based on its connection with the correlation.
b. Find the y-intercept of the regression line, and state the prediction equation.
c. Find the prediction equation for predicting verbal test result using math test result.