Explanation:
The rate of change can be calculated as:
[tex]m=\frac{y_2-y_1}{x_2-x_1}[/tex]Where (x₁, y₁) and (x₂, y₂) are two points in the line.
So, replacing (x₁, y₁) by (10, $289) and (x₂, y₂) by (20, $578), we get:
[tex]m=\frac{\text{ \$578 - \$289}}{20-10}=\frac{\text{ \$289}}{10}=\text{ \$28.9 per hour}[/tex]Then, the rate