4. Writing Equations in Two Variables
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Which variable causes a change in the other variable?
Independent Variable: s
Dependent Variable: c
We want to identify the independent and dependent variables of the given equation.
c=0.09s
This equation represents the amount c of commission a salesperson receives for making a sale of s dollars. To identify which variable is independent and which is dependent, we need to analyze which variable causes a change in the other variable.
The value of the sale causes the commission to increase . In other words, the commission c depends on the value of the sale s. Therefore, s is the independent variable and c is the dependent variable.