Chapter 8.4, Problem 37E

High School Graduates The percentage of the U.S. population 25 years and older with at least a high school diploma is shown in the table for selected years.

Heavy MetalNuclear Waste
Yearx	Wastey
1995	32
2000	42
2010	61
2020*	76
*Estimate by the U.S. Department of Energy.

Let $x=0$ represent 1950, $x=10$ represent 1960, and so on.

(a) Use the data for 1950 and 2000 to find a linear function f that models the data.

(b) Use the function from part (a) to approximate the percentage, to the nearest tenth, of the U.S. population 25 years and older who were at least high school graduates in 1995.