The y-intercept is the point where the graph crosses the y-axis.
The y-intercept of the graph is 20.
From the question, we have:
[tex]Start = 20m[/tex]
This means that we have a point at (0,20)
[tex]Next = 40m[/tex]
This means that we have another point at (x,40).
Assume [tex]x = 2[/tex]
So, the next point is (2,40)
[tex]Finish = 30m[/tex]
This means that we have another point at (x,30).
Assume [tex]x = 3[/tex]
So, the next point is (3,30)
See attachment for the graph.
From the graph, the y-intercept is 20.
Read more about y-intercepts at:
https://brainly.com/question/1354826