Question

variation equation and determine the quantity indicated.y varies directly as x. Determine y when x=20 and k=7

Answer 1

In this problem k = 7 so this is the rate of change so the equation is:

$y=kx$

so if x is equal to 20 then:

$\begin{gathered} y=7\cdot20 \\ y=140 \end{gathered}$