Determine whether y varies directly with c. if so, find the constant of variation k and write the equations.

y varies directly with x if and only if there exists a constant k such that

for every input/output couple. If so, we have

Let's see if our input/output couples satisfy this request: the first couple yields

The second couple yields

The third couple yields

The last couple yields

So, the ratio is indeed constant

what does x eaqual

step-by-step explanation:

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral