Question

Given the line of best fit for a data set of data points with the equation y=5x-2.5,what is the residual for the point (4,13)

Answer 1

(4,-0.6) D

Explanation:

Correct answer on EDGE 2021 :]

Answer 2

-4.5

Explanation:

The predicted value from the model is calculated by substituting x with 4 in the regression equation;

y = 5(4) - 2.5

y = 17.5

The actual value when x is 4 is given as 13. The residual is simply the difference between the actual and the predicted value;

residual = actual value - predicted value

residual = 13 - 17.5

residual = -4.5