0. Functions

Which of the following correctly describes the piecewise function graphed below, where the graph consists of a line with slope $2$ for $x<1$ and a constant value $3$ for $x\ge 1$?

Using the piecewise function below, evaluate $f\left(5\right)$

Using the piecewise function below, evaluate $$$f\(\left\)(-1\(\right\))$