Question: In the equation $m = 5 r + 4$, which of the following represents the dependent variable?
$r$
$5$
$m$
$4$
1. The problem asks us to identify the dependent variable in the equation $$m = 5 r + 4$$.
2. In an equation of the form $$y = mx + b$$, the dependent variable is the one that depends on the other variable. It is usually the variable isolated on one side of the equation.
3. Here, $$m$$ is expressed in terms of $$r$$, meaning $$m$$ depends on $$r$$.
4. Therefore, $$m$$ is the dependent variable, and $$r$$ is the independent variable.
5. The constants $$5$$ and $$4$$ are coefficients and constants, not variables.
Final answer: The dependent variable is $$m$$.