7. The graph shows the number of patients with an infectious disease over a period of 15 weeks

a. Give an example of a domain for
which the average rate of change is a
good measure of how the function
changes.
b. Give an example of a domain for
which the average rate of change is
not a good measure of how the
function changes
number infected
4,000
2.000
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
weeks since infection began
(From Unit 5. Lesson 10.)