Residual is the difference between the y value of scatter plot and y value of regression equation
A scatter plot containing the point (6, 8), the y value of scatter plot is 8
y=6x+4, to get y value of regression equation we plug in 6 for x
y = 6(6) + 4 = 40
Residual e = y value of scatter plot - y value of regression equation
=8 - 40 = -32
Answer : e=-32