Question

Penny is figuring the regression line for some data but needs help in first figuring the predicted value of y. she knows that the slope is 3 and the intercept is 4. what is the predicted y value for an x score of 7?

Answer 1

The generic equation of the line is:
 y = mx + b
 Where,
 m: slope of the line
 b: intersection with the y axis
 Substituting values we have:
 y = 3x + 4
 For x = 7 we have:
 y = 3 (7) +4
 y = 21 + 4
 y = 25
 Answer:
 The predicted and value for an x score of 7 is:
 y = 25