Final answer:
The position vs time graph of an object that is speeding up is not a straight line; it is a curve that becomes steeper over time, indicating acceleration.
Step-by-step explanation:
The correct answer to the question is b. False. When an object is speeding up, its position vs time graph is not a straight line. Instead, the graph will show a curve where the slope (which represents velocity) is increasing. If an object's velocity is increasing over time, it means that the object is accelerating. Therefore, the position vs time graph of an accelerating object will be a curve that gets steeper as time progresses, indicating that the object covers more distance in the same amount of time as it speeds up.