A sight-seeing bus travels around a city in 4 hours. The bus travels
15 km in the first hour. During the second hour, the bus stops to allow
passengers to explore the science museum. The bus then travels
30 km in the third hour and arrives at a drive-through animal park.
It takes the bus 1 hour to travel the 5 km road through the park.
Draw a line graph that represents the bus’s motion during the 4-hour period.