Question

mary investigated the effect of different concentrations of miracle grow on the growth of tomato plants. she grew four groups of tomato plants (10 plants/group) for 30 days. she then applied miracle grow as follows: group a : 0% miracle grow group b : 10% miracle grow group c : 20% miracle grow group d : 30% miracle grow the plants received the same amount of sunlight and water each day. at the end of 30 days, mary recorded the height of the plants (in centimeters). the independent variable is the dependent variable is

Explanation:

The independent variable is what the experimenter changes. Mary adjusted Miracle Grow concentrations. The dependent variable is what's measured in response; Mary recorded plant height.

Answer:

The independent variable is: Concentration of Miracle Grow
The dependent variable is: Height of the tomato plants