Write the equation of a direction variation that includes the given point, (3, 9)?

Question

I'm not asking for the answer, I'm just asking how to do it. It's a review for my math class and I haven't done this in two years.

Answer 1

I think you mean direct variation, not direction variation.

It's going to have the form y=mx.  Since you know one of the points, plug in the given point for x and y to find m

9=m*3

m=3

The equation is y=3x

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