# How do you write the total cost of oranges in function notation, if each orange cost $3? ##### 1 Answer $f \left(x\right) = 3 x$#### Explanation: One orange costs$$3$ hence if $x$ is the number of oranges then the total cost $f \left(x\right)$ of $x$ number of oranges

$f \left(x\right) = 3 x$

Where, $f \left(x\right)$ is in $& $x\$ is number of oranges