The mean and standard deviation of the number of practices are = 8 practices and sx = 4.47 practices. The mean and standard devi
ation of time are = 7.71 minutes and sy = 1.20 minutes. The correlation between number of practices and time to solve the Rubik’s cube is r = –0.793. Find the equation of the least-squares regression line for predicting time to solve the Rubik’s cube from the number of practices.