Solution:
Given that,
[tex]y = 4.50x[/tex]
We have to find the constant of proportionality in the equation
We know that,
When y varies directly with x, then
[tex]y \propto x\\\\y = kx ---- eqn\ 1[/tex]
Where, "k" is constant of proportionality
From given,
y = 4.50x
Compare the above equation with eqn 1,
Thus, constant of proportionality in the equation y = 4.50x is 4.50
