Question

Which equation has a constant of proportionality equal to 3?A. y=8/5 * xB. y=1/5 * xC. y= 1/4 * xD. y=18/6 * x

Answer 1

ANSWER:

D. y = 18/6 x

STEP-BY-STEP EXPLANATION:

We know that the constant of proportionality would be the coefficient that accompanies x. Therefore:

We simplify in each case, in order to determine which of all the options is equal to 3, just like this:

$\begin{gathered} y=\frac{8}{5}\text{ (can't be simplified further)} \\ y=\frac{1}{5}\text{ (can't be simplified further)} \\ y=\frac{1}{4}\text{ (can't be simplified further)} \\ y=\frac{18}{6}=\frac{6\cdot3}{6}=3 \end{gathered}$

Therefore, the equation that has a constant of proportionality is option D. y = 18/6 x