Question

Help immediately!!!!!!The following answers are:

A. -7<= t<= -4
B. -3<=t<= 0
C. 4<=t<=8
D. -9<=t<=-5

Answer 1

Answer: Choice C)
`4 \le t \le 8`

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Step-by-step explanation:

The point (4,5) is on the blue curve, and so is (8,9)

Draw a straight line through these points. This line has positive slope because it moves upward as we move from left to right, so there's a positive average rate of change from t = 4 to t = 8. Generally the curve goes upward as we move from t = 4 to t = 8.

Use the slope formula to compute the average rate of change if needed. It appears your professor doesn't want the actual numeric value, but just wants to know which interval corresponds to a positive average rate of change.

Answer 2

-7<=t<=-4

Step-by-step explanation:

from negative seven to negative four there is no decreasing, only increasing.