What is the average rate of change from 0 to 2 of the function represented by the graph?

-1/2

Step-by-step explanation:

When x = 0, y = 2; (0,2)     <- This is point "a"

When x = 2, y = 1; (2,1)     <- This is point "b"

Average rate of change = (f(b) - f(a)) / (b - a)

(1 - 2) / (2 - 0) = (-1 / 2) = -1/2

answer:

c. the third graph

56.6

step-by-step explanation:

the ratio of the perimeters is equal to the scale.

the ratio of the areas is equal to the square of the scale.

34 / 20 = k

a / 19.6 = k²

substituting:

a / 19.6 = (34 / 20)²

a = 19.6 (34 / 20)²

a ≈ 56.6