Chapter 2.5, Problem 32E

(a)

To determine

A quadratic function that models the data of U.S. population with Alzheimer’s disease, with $x$ equal to number of years past 2000 and $y$ equal to number of millions of Americans with Alzheimer’s.

(b)

To determine

A cubic function that models the data of U.S. population with Alzheimer’s disease, with $x$ equal to the number of years past 2000 and $y$ equal to the number of millions of Americans with Alzheimer’s.

(c)

To determine

To graph: Models obtained in part (a) and (b) on the same axes, with $x$ equal to the number of years past 2000 and $y$ equal to the number of millions of Americans with Alzheimer’s.

(d)

To determine

Whether one model is better visual fit than the other.