SAT Question dbe9b217: Nonlinear Functions answer and explanation with Desmos solution

It's given that the function $f$ is defined by $f\left(x\right)=8x^3+4$. Substituting $2$ for $x$ in this equation yields $f\left(2\right)=8{\left(2\right)}^3+4$, or $f\left(2\right)=8\left(8\right)+4$, which is equivalent to $f\left(2\right)=68$. Therefore, the value of $f\left(2\right)$ is $68$.