How do you read the expression $f\left(1\right)$ aloud?

Given $f\left(x\right)=3x-1$, evaluate $f\left(4\right)$.

A graph near $x=1$ shows an open circle at $(1,2)$ and a filled dot at $(1,3)$. What is $f\left(1\right)$?

A linear function $f$ is known to satisfy $f\left(1\right)=3$ and $f\left(3\right)=7$. Find the constants $a$ and $b$ so that $f\left(x\right)=ax+b$.

Is the set of ordered pairs $\left\{(1,2),(2,3),(1,4)\right\}\}$ a function? Choose the correct statement.