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Question: Which of the following function rules describes the number of yards as function of number of miles?


A ) f(x) = 240x
B ) f(x) = 1760x
C ) f(x) = 800x
D ) None of the above

Steps to derive

1 Let x be the number of miles.

2 Let f(x) be the number of yards to x miles.

3 One mile is equivalent to 1760 yards.

4 x miles is equivalent to 1760x yards.

5 So, the function rule is f(x) = 1760x.



Hence the right answer is Option B

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