The value, cap v times m , of a comic book m months after publication has an average rate of change of negative 0 point 0 4 between m is equal to 36 and m is equal to 60 Which statement must be true?
Answer
A
The value of the comic book decreased by a total of 0 point 0 4 dollars between m is equal to 36 and m is equal to 60 .
B
The value of the comic book increased by an average of 0 point 0 4 dollars each month between m is equal to 36 and m is equal to 60 .
C
The value of the comic book decreased by an average of 0 point 0 4 dollars each month between m is equal to 36 and m is equal to 60 .
D
The value of the comic book increased by a total of 0 point 0 4 dollars between m is equal to 36 and m is equal to 60 .
Explanation
An average rate of change is the change in value divided by the change in time. Since the rate is −$0.04 per month, the comic book’s value decreased by an average of $0.04 each month from month 36 to month 60. The total decrease would be $0.04 × 24 months = $0.96, so it is not a total decrease of $0.04.
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