The figure below shows the distance of a car from a measuring position located on the edge of a straight road.

(i) What was the average velocity from t = 10 to t = 30 seconds?

(ii) About how fast was the car traveling at t = 10 seconds?

(iii) What does the horizontal part of the graph between t = 15 and t = 20 seconds tell you?

(iv) What does the negative velocity at t = 25 represent?

\f