Answer:
Slope = 20
y-intercept = 60
Step-by-step explanation:
Slope formula is given as [tex] m = \frac{y_2 - y_1}{x_2 - x_1} [/tex]
Pick two points on the line and use their coordinates. Let's pick (1, 80) and (2, 100).
Let,
[tex] (1, 80) = (x_1, y_1) [/tex]
[tex] (2, 100) = (x_2, y_2) [/tex]
Plug the values above into the formula for slope:
[tex] m = \frac{100 - 80}{2 - 1} = \frac{20}{1}} = 20 [/tex]
Slope of the graph is 20.
The y-intercept is the point where the line intercepts the y-axis. Thus, y-intercept = 60.