Question

The number of calories burned, "C", varies directly with the time spent exercising, "t". When James runs for 2 hours, he burns 800 calories. Which of the following equations shows this direct linear variation?
A. C=t
B. C=2t
C. C=400t
D. C=800t

~Thanks ;)

Answer 1

Mathematics isn't my area, but I believe it is C.
Here is my reasoning:
The sentence, "the number of calories burned, "C", varies directly with the time spent exercising, "t"."
Basically says: c = kt.
C = Calories burned.
K = Proportionality Constant.
T = The number of hours.
In two hours James burns 800 calories, equation form: 800 = k(2).
800/2 = 400
So the answer is:
C = 400t

Answer 2

Thanks!

Answer 3

No problem :-).