Question

The cost of a drone camera ($c$, in $\$$) is $35$ times the range of a drone camera ($r$, in miles). Choose the correct option representing the equation that shows the relation between $\left(c\right)$ and $\left(r\right)$ and find the dependent and independent variables.

• A. Equation: $c=35÷r$, where $r$ is an independent variable, and $c$ is a dependent variable.
• B. Equation: $c=35r$, where $r$ is a dependent variable, and $c$ is an independent variable.
• C. Equation: $c=35÷r$, where $r$ is a dependent variable, and $c$ is an independent variable
• D. Equation: $c=35r$, where $r$ is an independent variable, and $c$ is a dependent variable.

Answer 1

The correct option is D Equation: $c=35r$, where $r$ is an independent variable, and $c$ is a dependent variable.

As the cost of the drone camera $\left(c\right)$ is $35$ times the range of the drone camera $\left(r\right)$, the equation to represent the relation is $c=35\times r$
$c=35r$
Also, the variable representing the quantity that can change freely is the independent variable. The other variable whose value relies on the value of the independent variable is the dependent variable.

As the cost of the camera depends upon the range of the camera, $r$ is the independent variable, and $d$ is the dependent variable.

Option A is correct.