This graph shows the linear relationship between commission earned (c) by a salesperson and number of sales he makes (s).
Commission Earned
С
40$
32
24
Commission Earned ($)
16
s
1 2 3 4 5
Number of Sales
Find the constant of proportionality (r). Using the value for r, enter an equation in the form of cars that represents
the relationship between the commission earned (c) and the number of sales (s)