Q. 4 - Precalculus Enhanced with Graphing Utilities

Question

If the point $\left(5,-3\right)$ is a point on the graph of f, then$f\left(5\right)=$ ________.

Step-by-Step Solution

Answer

The value of $f\left(5\right)=-3$

Step 1. Definition

For a function, no input has more than one output. The domain of a function is the set of all inputs; the range is the set of all outputs.

Step 2. Final answer

The input value is x-coordinate and the output value is y-coordinate in $\left(5,-3\right)$.

So, $f\left(x\right)=y$.

Substitute value of $x=5$ and $y=-3$ in $f\left(x\right)=y$,

$f\left(5\right)=-3$