at what rate would a 120 pound person burn calories while bicycling at 12 mi/h?

Question

150 pound person would be 410 calories at 12 mi/h

Answer 1

Set up similar ratios:
n / 120 = 410 / 150
n = 410 x 120 / 150
n = 410 x 4/5
n = 1640 / 5
n = 328 calories

Answer 2

Since the ? asks for a RATE, the answer would be 328 cal PER HOUR. (Or whatever time period the 150 lb person is supposed to burn 410 cal.) That wasn't stated and needs to be for a rational answer to the ?..............