Question

Bryan's puppy has been gaining weight for the last year. The graph shows data about the puppy's weight over time.


The puppy's veterinarian told Bryan to switch to adult dog food when the puppy weighs 90 pounds. Which is a reasonable prediction for the month Bryan can switch to adult dog food?

A.month 10

B.month 8

C.month 11

D.month 6

Answer 1

Obviously, month 6 already happened and the dog only weighed 50 pounds. Similarly, it would be uncharacteristic to see the dog's weight nearly double in the next two months. So you are left with 10 or 11 months.

To my eye, sketching a line through month 10, weight 90 seems too aggressive given that the dog only appeared to gain 5 pounds in month 6.