Question

Let’s say that, generally speaking, Amy thinks exercise is good for your health, but if you exercise for more than four hours per day, every day, exercise begins harming your health. Amy runs the following regression. Exercise is in hours of exercise per week. Does the following equation support Amy’s belief? Please explain.

Health = 6 + 30Exercise – 12Exercise².

In case, the squared term doesn't appear correctly in some people's browsers, I have written the above formula a slightly different way below.

Health = 6 + 30Exercise – 12Exercise^2.

Answer 1