Answer:
The constant of proportionality is equal to sixty
Step-by-step explanation:
we know that
A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form [tex]y/x=k[/tex] or [tex]y=kx[/tex]
In a proportional relationship the constant of proportionality k is equal to the slope m of the line and the line passes through the origin
In this problem we have
[tex]y=60x[/tex]
so
[tex]m=k=60[/tex]
therefore
The constant of proportionality is equal to sixty