Please solve for f(x)

label Mathematics
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Solve for f(x)

x           f(x)

100       ?

60       24

45       18

30        12

How do you solve for ?  Thanks! 

Sep 30th, 2015

Compare x and f(x) values. The ratio of f(x) and x is the same.

That is  24/60 = 2/5

Similarly 18/45 = 2/5

In other words , 18 = (2/5) *45

So f(x ) =  (2/5) * x

So f(x) when x = 100 is (2/5) * x = 40



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Sep 30th, 2015

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Sep 30th, 2015

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