The line graph below displays the average
u. s. farm size, in acres, during a 12-year
period. during which years did the average
u. s. farm size decrease at a constant rate?
average u. s. farm size
average farm size (in acres)
1
2
3 4
5
8
9 10 11 12
6 7
year
a. years 1-3
b. years 3-5
c. years 5-6
d. years 6-9