PSLE
The graph shows the height of a plant from July to November.

1. What was the height of the plant in November?
2. During which period did the plant have no change in height? Give your answer in numbers. (Eg Jan to Feb = 1 to 2)

(a)
Height of the plant in July (7) = 10 cm
Height of the plant in August (8) = 19 cm
Height of the plant in September (9) = 19 cm
Height of the plant in October (10) = 24 cm
Height of the plant in November (11) = 31 cm

Height of the plant in November (10) = 31 cm

(b)
To find the greatest increase, look for the steepest increase in the line graph.

To prove:
Increase in height from July (7) to August (8) = 19 - 10 = 9 cm
Increase in height from August (8) to September (9) = 19 - 19 = 0 cm
Increase in height from September (9) to October (10) = 24 - 19 = 5 cm
Increase in height from October (10) to November (11) = 31 - 24 = 7 cm

Period which the plant grew the least = August (8) to September (9)

Answer(s): (a) 31 cm; (b) 8 to 9