The life expectancy E , in solar lifetimes, of certain stars depends on their mass M , in solar masses. The relationship is $E = M ^ { - 25 }$ As mass increases, life expectancy decreases. What can you say about the rate of decrease? A graph of E versus M can help you answer this question.
A) Life expectancy decreases at a decreasing rate.
B) Life expectancy decreases at an increasing rate.
C) Life expectancy reaches a point of inflection.
D) None of the above.

Question

The life expectancy E , in solar lifetimes, of certain stars depends on their mass M , in solar masses. The relationship is $E = M  ^ { - 25 }$ As mass increases, life expectancy decreases. What can you say about the rate of decrease? A graph of E versus M can help you answer this question.
A) Life expectancy decreases at a decreasing rate.
B) Life expectancy decreases at an increasing rate.
C) Life expectancy reaches a point of inflection.
D) None of the above.

Quizplus · Accepted Answer

The Answer is A

The Life Expectancy E , in Solar Lifetimes, of Certain E=M−25E = M ^ { - 25 }E=M−25

The Life Expectancy E , in Solar Lifetimes, of Certain $E = M ^ { - 25 }$