Cereals again We saw a model in Exercise 24 for the calorie count of a breakfast cereal. Can we predict the calories of a serving from its vitamin and mineral content? Here’s a multiple regression model of Calories per serving on its Sodium (mg), Potassium (mg), and Sugars (g):

Assuming that the conditions for multiple regression are met,

a) What is the regression equation?

b) To check the conditions, what plots of the data might you want to examine?

c) Will adding Potassium to a breakfast cereal lower its Calories? Explain briefly.