For Exercise, refer to Figure 2 and find ∆x, ∆y, and m = ∆y/∆x for each of the indicated i...

For Exercise, refer to Figure 2 and find ∆x, ∆y, and m = ∆y/∆x for each of the indicated intervals. (Be sure to include units with your answers.)

Figure 2

(a) x = 10 sec to x = 15 sec

(b) x = 10 sec to x = 25 sec

(c) x = 5 sec to x = 30 sec