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Question: Which of the following function rules describes the number of grams as function of number of kilograms?


A ) f(x) = x1000
B ) f(x) = 2640x
C ) f(x) = 1000x
D ) None of the above

Steps to derive

1 Let x be the number of kilograms.

2 Let f(x) be the number of grams to x kilograms

3 One kilogram is equivalent to 1000 grams.

4 x kilograms is equivalent to 1000x grams
 [words.]

5 f(x) = 1000x
 [Rule.]

6 The function rule is f(x) = 1000x.



Hence the right answer is Option C

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