As the baby boom generation ages and the proportion of the U.S. population over age 65 increases,

Question:

As the baby boom generation ages and the proportion of the U.S. population over age 65 increases, the number of Americans with Alzheimer's disease and other dementia is projected to grow each year. The table below gives the millions of U.S. citizens age 65 and older with Alzheimer's from 2000 and projected to 2050.
(a) Find the quadratic function that models the data, with x equal to the number of years past 2000 and y equal to the number of millions of Americans with Alzheimer's.
(b) Find the cubic function that models the data, with x equal to the number of years past 2000 and y equal to the number of millions of Americans with Alzheimer's.
(c) Graph each model and the data on the same axes.
(d) Determine if one model is a better visual fit to the data.