Answer:
40.12
Explanation:
y varies directly with x
This is written as:
[tex]y\propto x[/tex]Introducing the constant of proportion k, we have:
y = kx
If y=22 when x=17
[tex]\begin{gathered} 22=17k \\ k=\frac{22}{17} \end{gathered}[/tex]Therefore, the equation connecting y and x is:
[tex]y=\frac{22}{17}x[/tex]When x=31
[tex]\begin{gathered} y=\frac{22}{17}\times31 \\ y=40.12 \end{gathered}[/tex]