Question

Confused about c).

Would it be Q-R because the velocity isn’t increasing or all of them because they are all linear lines?

The question says interval and not interval(s) so that’s why it’s making me think it may be the latter.

Answer 1

Answer:

Q-R is correct

Explanation:

A constant velocity means a velocity that is not changing.

The velocity is increasing (changing) in O-P, P-Q and R-S.

Since the Q-R segment is a horizontal line, the velocity stays the same. If you imagine the graph's velocity y-axis is labelled, it might be easier to think about.

Answer 2

Answer:

The velocity is constant only in the Q-R interval.

Explanation:

The graph shows the velocity over time. In the Q-R interval the velocity is equal all over the interval, that is, it is constant. In the other intervals, the velocity increase with some rate, so it is not constant.