Answer:
Question 1: c) 12.5 m/s
Question 2: a) The object is not moving.
Explanation:
Question 1: 100(m) divided by 8(s) equals 12.5(m/s)
So she goes 12.5 meters per second (m/s).
Question 2: Distance = x variable (horizontal) because the distance depends on the time. Time = y (vertical) because the time is independent.
If the points on the distance or x axis stay the exact same while the time or y axis continues to change, this will lead to a straight horizontal line on a graph and mean that whatever it is being measured for distance, is staying still or 'constant'.