Rearrange the equation so b is the independent variable.
4a + b = -52

A. Define the independent variable.

The independent variable is a variable in an experiment or research that affects the dependent variable and gets manipulation or change in the study.

B. List the independent variable(s).

Amount of water each group of plants receives.

C. Define dependent variable.

A dependent variable is a variable that depends on the independent variable and is measured to see the effect of manipulation in the independent variable.

D. List the dependent variable(s).

Height of the plants

E. Define controlled variables.

Controlled variables are the variable that remains the same and did not change in the experiment to avoid any other effect than independent variables on subjects.

F. List three controlled variables.

equal size of land

amount of fertilizer

Number of plants in each group

Period of time

G. Define control group.

The control group is the group of subjects that did not get treatment as the experimental group receives for the comparison of the result and ensuring if the experiment works.

H. List the control group.

A group of plants that receives 5 cups of water is required in a normal condition.

I. What conclusion can you draw from the data? How is it supported with the data?

The amount of water affects the height of plants but up to an extent.

A. Define the independent variable.

The independent variable is a variable in an experiment or research that affects the dependent variable and gets manipulation or change in the study.

B. List the independent variable(s).

Amount of water each group of plants receives.

C. Define dependent variable.

A dependent variable is a variable that depends on the independent variable and is measured to see the effect of manipulation in the independent variable.

D. List the dependent variable(s).

Height of the plants

E. Define controlled variables.

Controlled variables are the variable that remains the same and did not change in the experiment to avoid any other effect than independent variables on subjects.

F. List three controlled variables.

equal size of land

amount of fertilizer

Number of plants in each group

Period of time

G. Define control group.

The control group is the group of subjects that did not get treatment as the experimental group receives for the comparison of the result and ensuring if the experiment works.

H. List the control group.

A group of plants that receives 5 cups of water is required in a normal condition.

I. What conclusion can you draw from the data? How is it supported with the data?

The amount of water affects the height of plants but up to an extent.

The correct answer is it alters the test variable (independent variable) and observes the effects on the outcome variable (dependent variable).

The correct answer is it alters the test variable (independent variable) and observes the effects on the outcome variable (dependent variable).

D. Performing a fair test in which only the independent variable affects the dependent variable.

Explanation:

Validity is a measure of how correct the result of the experiment is. The validity of the experiment is based upon the correctness of the research topic, and correctness and implementation of the scientific procedures.  

Performing a fair test that can be based upon use of the independent and dependent variables can yield results which will be valid and acceptable. The independent variable in an experiment is the variable which can be changed to know it's affect on the dependent variable. The dependent variable will help in determining the result of the experiment.

D. Performing a fair test in which only the independent variable affects the dependent variable.

Explanation:

Validity is a measure of how correct the result of the experiment is. The validity of the experiment is based upon the correctness of the research topic, and correctness and implementation of the scientific procedures.  

Performing a fair test that can be based upon use of the independent and dependent variables can yield results which will be valid and acceptable. The independent variable in an experiment is the variable which can be changed to know it's affect on the dependent variable. The dependent variable will help in determining the result of the experiment.