Question

A linear model for a set of data was y = –20.6 + 9.72x and produced the following residual plot: [Xscl = 1, Yscl = 5]

Scatterplot

a) Predict the value of y when x = 7.5.
b) Determine the residual if x = 5. (2 points)

Answer 1

a) y = -20.6 + 9.72x
x = 7.5

y = -20.6 + 9.72(7.5) = 52.3

b) -6

Answer 2

thanks