A translation is a movement of the graph either horizontally parallel to the \(x\)-axis or vertically parallel to the \(y\)-axis. The graph of \(f(x) = x^2\) is the same as the graph of \(y = x^2\).
You write the inverse of \(f(x)\) as \({f^{ - 1}}(x)\). This reverses the process of \(f(x)\) and takes you back to your original values.