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Question: Which of the following function rules describes the number of seconds as a function of number of hours?


A ) f(x) = 60x
B ) f(x) = 3600x
C ) f(x) = x3600
D ) f(x) = x60

Steps to derive

1 Let x be the number of hours.

2 Let f(x) be the function describing the number of seconds to x hours.

3 One hour is equivalent to 3600 seconds.

4 x hours is equivalent to 3600x seconds.

5 So, the function rule is f(x) = 3600x.



Hence the right answer is Option B

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