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A team from the Department of Public Works is painting lines on the freeway. The number of hours needed to finish the project depends on the length of road that needs to be lined.$\newline$$h =$ the number of hours needed$\newline$$r =$ the length of road$\newline$Which of the variables is independent and which is dependent?$\newline$Choices:$\newline$(A) $r$ is the independent variable and $h$ is the dependent variable$\newline$(B) $h$ is the independent variable and $r$ is the dependent variable