the expression for a proportional relationship is,
[tex]y=kx[/tex]
here, k = proportionality constant
we will put the value of x and y corresponding to each other from the table
for (3,18)
[tex]\begin{gathered} 18=k\times3 \\ k=\frac{18}{3} \\ k=6 \end{gathered}[/tex]
for (6,36)
[tex]\begin{gathered} 36=k\times6 \\ k=\frac{36}{6} \\ k=6 \end{gathered}[/tex]
thus the given table is the table of a proportional function
and the constant of proportionality is 6
