Question 2.46

2.46 A regression line

A regression equation is y = 15 + 30x.

  1. What is the slope of the regression line?
  2. What is the intercept of the regression line?
  3. Find the predicted values of y for x = 10, for x = 20, and for x = 30.
  4. Plot the regression line for values of x between 0 and 50.