High school graduates: The following table shows the number, in millions, graduating from high school in the United States, in the given year. a. Explain in practical terms what N XXXXXXXXXXmeans, and...

High school graduates: The following table shows the number, in millions, graduating from high school in the United States, in the given year.

a. Explain in practical terms what N (1989) means, and find its value.

b. Use functional notation to express the number of graduates in 1988, and estimate its value.

c. Find the average rate of change per year during the period 1989 to 1991.

d. Estimate the value of N (1994).