Question

Y varies directly with x, and y = 40in when x = 15in

Answer 1

If y varies directly with x, that means there is going to be a constant that connects both the x and y variable.

`\begin{gathered} \text{When x=15, and y=40, then} \\ k=(y)/(x) \\ k=(40)/(15) \\ k=(8)/(3) \\ \text{Therefore, the equation is going to be;} \\ y=(8)/(3)x \end{gathered}`

The appropriate direct variation equation is stated above, and that is;

y = 8/3x