The amount of money Jia earns per day is the same for each time period, so the relationship is proportional. with a constant of proportionality of 40.
How to calculate the amount Jia earns?
In order to determine the amount of money Jia earns per day, we would take the slope of the graph by using this formula:
[tex]Slope = \frac{Change\;in\;y\;axis}{Change\;in\;x\;axis}\\\\Slope = \frac{y_2\;-\;y_1}{x_2\;-\;x_1}\\\\Slope = \frac{40\;-\;0}{1\;-\;0}\\\\Slope = \frac{40}{1}[/tex]
Slope = 40
Note: Taking any point on the graph would give the same slope because it is a linear graph (proportional).
In conclusion, we can deduce that the amount of money Jia earns per day is the same for each time period, so the relationship is proportional.
Read more on proportions here: brainly.com/question/870035
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