For which intervals below is the average rate of change of m (x) = - 5x-3 less than - 25? Interval A 3 ≤ x ≤ 5 B 4 ≤ x ≤ 5 C 4 ≤ x ≤ 6

The slope is - 5x

So plug in the numbers from the answers and the correct answer will be the one that gives you an answer less than 25.

Ex: - 5x (3) = - 15, - 5x (5) = - 25

This would be an incorrect answer because - 15 is less than 25 and - 25 is equal to 25, not less than.