It is a direct [linear] proportionality.
cause a change
direct proportion
the types of variables are three the constant,manipulated and responding...
The manipulated variable is the variable that is deliberately changed or controlled in an experiment, while the responding variable is the variable that is observed and measured to see how it changes in response to the manipulation. The relationship between the two is that changes in the manipulated variable are expected to cause changes in the responding variable, allowing researchers to investigate cause-and-effect relationships.
Scientists utilize controlled experiments where they manipulate only one variable at a time while keeping all other variables constant to ensure that any changes in the responding variable are due to changes in the manipulated variable. This helps establish a cause-and-effect relationship between the variables being studied. Additionally, incorporating control groups can further validate the relationship between the manipulated and responding variables.
The covered jar was the manipulated variable and the responding variable was the result: No maggots.
the controlled variables are the factors that are kept constant during an experiment. if they are not kept constant then they may affect the outcome of the experiment. the manipulated variable is the factor that is different between the experiment and the control. the responding variable is the variable that is being measured in the experiment.
Straight line.
it is a direct relationship -eli martin
A controlled experiment is useful to examine the relationship between a manipulated variable and a responding variable.
the manipulated variable was the covered jars . The responding variable was the uncovered jars contained any maggots
That is the point of doing the experiment. You are trying to find out if there is any relationship at all.