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Identity the equation of direct variation given that y varies directly with x.y is 75 when x is 5.

Identity the equation of direct variation given that y varies directly with x.y is-example-1

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Okay, here we have this:

Considering the provided information, we are going to identify the equation, so we obtain the following:

If y varies directly with x then it means that x goes in the denominator of the function.

And let's determine by what value we have to multiply x so that y is 75 when x is 5:

y=kx

Replacing

75=k*5

k=75/5

k=15

Then, the function is: y=15x. And the correct answer is the first option.

User Luke Robertson
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