Final answer:
To determine if the speed of a minivan is between t1 and t2, you need to consider the velocity vs. time graph. Speed is the magnitude of velocity, so you can find the speed at any given time by looking at the magnitude of the velocity at that time.
Step-by-step explanation:
To determine if the speed of a minivan is between t1 and t2, you need to consider the velocity vs. time graph. Speed is the magnitude of velocity, so you can find the speed at any given time by looking at the magnitude of the velocity at that time.
If the velocity is between -t2 and -t1, then the minivan's speed is between t1 and t2. If the velocity is greater than -t1, then the minivan is moving faster than t1. If the velocity is less than -t2, then the minivan is moving slower than t2.
For example, if the velocity at t1 is -10 m/s and the velocity at t2 is -20 m/s, and the minivan's velocity at a specific time is -15 m/s, then the speed is between 10 m/s and 20 m/s.