To determine the amount of money earned per hour by the babysitter, we calculate the rate of change/slope of the line.
This is done by first picking two points on the line.
[tex](x_1,y_1)\text{ and }(x_2,y_2)[/tex]That is, for each point, trace it to the x and y-axis.
Next, substitute the points into the slope formula below:
[tex]Slope,m=\frac{y_2-y_1}{x_2-x_1}[/tex]This should give the amount earned per hour.
