Question

laundry mat expenses
what is the constant of proportionality?

Explanation:

Step1: Recall the formula for constant of proportionality

For a proportional relationship $y = kx$, $k=\frac{y}{x}$.

Step2: Select a point from the graph

Let's take the point $(1, 2)$ where $x = 1$ (loads of laundry) and $y=2$ (money spent).

Step3: Calculate the constant of proportionality

$k=\frac{y}{x}=\frac{2}{1}=2$.

Answer:

2