Income in euros Refer to the previous exercise. Results in the regression equation yn = -20,000 + 4000x for y = annual income were translated to units of euros at a time when the exchange rate was $1.25 per euro.

a. Find the intercept of the regression equation.

(Hint: What does 20,000 dollars equal in euros?)

b. Find the slope of the regression equation.

c. What is the correlation when annual income is measured in euros? Why?