At the end of the ½ hour, the car reaches a region where the road begins to rise up into some mountains. The car climbs the mountains for a further ½ hour.
During the climb, its speed steadily decreases to 30 km / hour. The driver then stops the car so that he can admire the view.
On Fig. 1.2, draw a line representing the climb and the stopping of the car.
Second section of line:
straight line sloping down B1
line starting at end of previous section and ending at 1 hour
(condone not straight) B1
line ending at 30 km/hour B1
Third section of line:
vertical/near vertical line down to 0 at 1 hour B1 ignore further sections of graph