Dalila plans an experiment to examine plant growth. she
made a table to record her results.
what addition to her table would most improve her
experimental investigation?
o a row in which no fertilizer is used
a row in which 12 grams of fertilizer are used
o a column that shows how the dependent variable
changes
a column that shows how the independent variable
changes

The answer is: a column that shows how the dependent variable changes.

Explanation:

An experiment is a process that is carried out by a researcher in order to find out whether his hypothesis is valid. In order to conduct a proper experiment, it is very important to include both the "dependent" and "independent" variables.

A dependent variable refers to the variable that changes in response to the presence of an independent variable. On the contrary, an independent variable is the variable (such as factors) that is being changed in order to control the experiment.

Remember that independent variables do not depend on other factors. Thus, it is only the dependent variable's change that matters in an experiment.

This is the reason why Dalila needs to have a column that shows the dependent variable changes (and not the independent variable changes).

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