Question

[ Please help ] The graph below plots a function f(x).

Answer 1

25 (units of distance/units of time)

The first two seconds are determined between points (0,50) and (2,100). Given these points, finding the slope between them gives you the average rate of change:

$\frac{Δy}{Δx} = \frac{(100 - 50)}{(2 - 0)} = \frac{50}{2} = 25$