Question

A set data has a line of best fit of y=2.5-1.5
What is the residual for the points (4,7)
A,B,C,D in pic

Answer 1

The residual is -1.5 so the answer is a
The expected value is 8.5 when you plug 4 into the equation
Residual=observed-expected=7-8.5=-1.5