Question

7) CJ was painting his apartment. In 15 minutes,CJ had used 1/5 gallon of paint. Write an equationthat represents the gallons of paint used, y, in xhours.re

Answer 1

Apply direct proportion

The question discribe a direct proportion. As one quantity increase, the other increase and as it decrease, the other also decrease.

15 minutes = 1/5 gallons

60x = y

Next express each equation into ratio and equate.

`\begin{gathered} (15)/((1)/(5))\text{ = }(60x)/(y) \\ \text{cross multiply} \\ 15y\text{ = }(1)/(5)\text{ x 60x} \\ 15y\text{ = 12x} \end{gathered}`