Plz hurry i need this answer
based on the graph, the independent variable is

a) cadmium dosage.

b) tadpole population

c) gallons of pond water.

d) total bullfrog population.

The correct option is A) cadmium dosage

Explanation:

In an experiment, an independent variable can be described as a factor which is changed naturally or by us to see its effect on the dependent variable. The dependent variable is the variable which is under study and depends on the independent variable.

In the following experiment, we are checking the effect of different dosages of cadmium on the surviving ability of tadpoles. Hence, cadmium dosage is the independent variable. Tadpole population is the dependent variable.

substitution is the answer in this case

a = executive branch; b = judicial branch