Answer:
[tex]k = 40[/tex]
Step-by-step explanation:
Given
The attached graph
Required
Calculate the constant of proportionality.
Represent the required constant with k.
Such that:
[tex]k = \dfrac{y}{x}[/tex]
Pick any two corresponding values of x and y
[tex](x,y) = (1,40)[/tex]
This means that:
[tex]x = 1\ and\ y = 40[/tex]
[tex]k = \dfrac{y}{x}[/tex] becomes
[tex]k = \frac{40}{1}[/tex]
[tex]k = 40[/tex]
