Question

Find the equation of the least squares regression line if: x-bar = 101, sx = 2.3, y-bar = 10, sy = 0.5, r = -0.9.
a) y = -0.9x + 109
b) y = 0.9x - 109
c) y = -0.5x + 10
d) y = 0.5x - 10