With more then a million teachers set to retire we are seeing a record number of turnovers in the teaching profession. In a time where student enrollments across America are increasing at a rapid place experts predict that we will need more then two million teachers over the next decade. Clearly define the dependent and independent variables for the shortage of teachers in the United States. The dependent variable is the variable whose value is the result or is a function of the control or independent variables.
This problem discusses the number of teachers required as a function of time.
A manipulated variable in an experiment or study whose presence or degree determines the change in the dependent variable.
No one can really "manipulate" time, however one can choose the time interval in which measurements of the dependent variable will be taken. Thus the time variable is the independent variable in this situation.
Dependent variable: ...
The solution demonstrates what is the difference between independent and dependent variable and how to distinguish between them.