A biology student wanted to study the effect of fertilizer on the growth of tomato plants. He placed four of the
same type of tomato plants into separate containers, each containing the same amount of soil. Each pot received
a different watering solution, containing varying amounts of fertilizer.
The table below shows the average height of the plants by the end of one week.
Plant group
Fertilizer amount (g)
Avg height of plants (cm)
3.0
3.2
4.4
20
5.0
What is the dependent variable in this experiment?
Choose 1
A
The amount of fertilizer
B
The type of tomato plant
The height of the plants
(D)
The amount of soil provided