The constant of proportionality is 12
Constant of proportionality
The slope of the graph is equivalent to the constant of proportionality
The formula for calculating the slope is given as:
[tex]m =\frac{y_2-y_1}{x_2-x_1}[/tex]
Using the coordinate points (5, 60) and (3, 36)
Substitute the given parameters into the equation:
[tex]m =\frac{36-60}{3-5}\\m =\frac{24}{2}\\ m = 12[/tex]
Hence the constant of proportionality is 12
Learn more on slopes here; https://brainly.com/question/3493733
