Answer:
Average change in height of the plant is 0.5 cm per day.
Step-by-step explanation:
Height of the plant on day 20 = 40 cm
Height of the plant on day 40 = 50 cm
Change in height = 50 - 40 = 10 cm
Number of days between day 20 and day 40 = 20
Average change in height of the plant = [tex]\frac{\text{Change in height of the plant}}{\text{Duration}}[/tex]
= [tex]\frac{10}{20}[/tex]
= 0.5 cm per day
Therefore, average change in height of the plant is 0.5 cm per day.
