Question

Which of the following equations represents direct variation?A. y=3x+4B. xy=6C. 3x-6y=0D. x+y=6Please help!!!

Answer 1

To see if they represent a direct variation we have to write yhem in the form:

$y=kx$

so we rewrite the four equations like:

$\begin{gathered} A\to y=3x+4 \\ B\to y=\frac{6}{x} \\ C\to y=\frac{3}{6}x \\ D\to y=-x+6 \end{gathered}$

So the only one that has the same form is option C