Education Spending Personal expenditures for higher education rose dramatically from 1990...

Education Spending Personal expenditures for higher education rose dramatically from 1990 to 2008. The figure shows the personal expenditures for higher education in billions of dollars for selected years during 1990–2008.

a. If a line were drawn connecting the points (1990, 34.7) and (2008, 135), what would be the slope of the line?

---

b. What is the average rate of change of expenditures between 1990 and 2008?

---

c. Is the rate of change of expenditures the same each year?