The slope of the graph is $15 per hour. The linear function is given by y = 15x
What is a linear function?
A linear function is in the form:
y = mx + b
Where y, x are variables, m is the rate of change and b is the y intercept
The graph passes through the point (1, 15) and (8, 120) is:
y - 15 = [(120 - 15)/(8 - 1)(x - 1)
y = 15x
For 20 hours; y = 15(20) = $300
If the person got a $50 bonus and also worked some hours, the graph would change because the y intercept would be 50.
If the person got a $2 per hour rate, the graph would change because the slope would be 2.
The slope of the graph is $15 per hour.
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