The function f(x) varies directly with x and f(x)=90 when x = 30. what is f(x) when x = 6?

f(x)=18

Step-by-step explanation:

We are given that

So, ---1

Where k is the constant of proportionality

f(x)=90 when x = 30

Substitute the values in Equation 1

So, equation becomes :

Now find f(x) when x = 6

Substitute x = 6 in equation 2

Hence f(x)=18 when x = 6

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step-by-step explanation:

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