Answer:
3 is the constant of proportionality in miles per hour.
Step-by-step explanation:
We are given a graph that shows the distance from the school.
For the shown graph we can pick two points on the graph.
(1,3) and (2,6).
In order to find the constant of proportionality in miles per hour, we need to find the slope of the line using above two points on the line.
We know, slope is given by formula
Slope = [tex]\frac{y_2-y_1}{x_2-x_1}[/tex].
Plugging values in above formula, we get
[tex]\frac{6-3}{2-1} =\frac{3}{1} =3[/tex].
Therefore, 3 is the constant of proportionality in miles per hour.
