Is it wrong to represent a dependent variable and a function using the same symbol? For example, can we write the parametric equations of a curve in xy-plane as $x=x(t)$, $y=y(t)$ where $t$ is the parameter?
Also, if someone write the following equation
$y=y(t) = t^2$
where $y$ represents the dependent variable and t represents the independent variable, then is it wrong to say that $y(t)$ is merely used to represent the value of the dependent variable, $y$ when $t$ equal some value and $y$ in $y(t)$ does not represent a function?