the expression for a proportional relationship is,
![y=kx](https://img.qammunity.org/2023/formulas/mathematics/college/zfnjlk9kn7jg7cyy0nlnepmsiaxj3b2oge.png)
here, k = proportionality constant
we will put the value of x and y corresponding to each other from the table
for (3,18)
![\begin{gathered} 18=k*3 \\ k=(18)/(3) \\ k=6 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/91fcinva1w2ailst8lszse2skcgzgip8ve.png)
for (6,36)
![\begin{gathered} 36=k*6 \\ k=(36)/(6) \\ k=6 \end{gathered}](https://img.qammunity.org/2023/formulas/mathematics/college/9g4dldhxnakx66zgmvw0rrxarncirnlhjl.png)
thus the given table is the table of a proportional function
and the constant of proportionality is 6