Answer
$y$ is a function of $x$
Work Step by Step
Solve the equation for $y$:
$2x-y-3=0$
$-y=-2x+3$
$y=2x-3$
So, for each value of $x$ in the domain we will find one and only one value of $y$. For example, if $x=3$:
$y=2(3)-3=3$
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