Question

A recent study reports that elementary school students who were given a nutritious breakfast each morning had higher test scores than students who did not receive the breakfast. For this study, what is the independent variable?​

Answer 1

The independent variable is whether the student received a nutritious breakfast each morning or not.

Step-by-step explanation:

The independent variable is the one that in the study/research does not depend or is a function of other variables, conversely the dependant variable is the one who depends or is function of other variable. In this case Test scores is the dependent variable and whether the student receives a nutritious breakfast each morning or not is the independent variable because in this research they are studying the effects that a nutritious breakfast in the morning has in the performance of students in the tests.