From the given graph, let's solve for the following:
• (a) The slope of the line.
To find the slope of the line, apply the slope formula:

Now, take two points on the line:
(x1, y1) ==> (0, 45)
(x2, y2) ==> (5, 120)
Input values into the slope formula and find the slope of the line:

The slope of the line, m, = 15
• (b.) How much does her pay increase for each hour worked.
The slope of a line can also be defined as the average rate of change.
Since the slope of the line is 15, we can say her pay increases by $15 for each hour worked.
ANSWER:
• (a) Slope = 15
• (b) Her pay increases by $15 each hour.