The following graph shows the approximate value V(t) of subprime (normally classied as risky) mortgage debt outstanding in the United States....

Vt

(a) Use the graph to estimate, to one decimal place, the average rate of change of V(t) with respect to t over the interval [0, 4] and interpret the result.

The average rate of change is  , which means that the subprime mortgage debt outstanding was increasing at an average rate of around $  billion per year between 2000 and 2004.

(b) Over which 2-year period(s) was the average rate of change of V(t) the least? (Select all that apply.) HINT [See Example 2.]

[2, 4]

[4, 6]

[6, 8]

The following graph shows the approximate value V(t) of subprime (normally classified as risky) mortgage debt outstanding in the United States. Subprime debt outstanding1,4001.2001,000 3 (Billions)§ o 2 4 6 82000 2008Year (I) (a) Use the graph to estimate, to one decimal place, the average rate of change of V(t) with respect to 1‘ over the interval [0, 4] and interpret the result. The average rate of change is , which means that the subprime mortgage debt outstanding was increasing at an average rate of around $ billionper year between 2000 and 2004. (b) Over which 2—year period(s) was the average rate of change of V(t) the least? (Select all that apply.) HINT [See Example 2.]D [2, 4] D [4. 6]D [6, 8]