We know Speed = [tex] \frac{Distance }{time} [/tex]
Average speed = [tex] \frac{Change in distance }{change in time} [/tex]
Average speed is nothing but the slope
Now we find slope from the given graph
The graph starts at (0,0)
The bile reaches 14miles in 1 hour (1, 14)
We got two point (0,0) and (1,14)
Slope = [tex] \frac{y_2 - y_1}{x_2-x_1} [/tex]= [tex] \frac{14 - 0}{1-0} [/tex]
= [tex] \frac{14}{1} [/tex] = 14
So Average speed = 14 mph
