Question

it is given that $y$ is a function of $x$, and $y$ is 5 when $x$ is 3.
represent $x=3$ and $y=5$ using function notation.
a. $f(3)=15$
b. $f(x)=5$
c. $f(5)=3$
d. $f(y)=3$
e. $f(3)=5$

Explanation:

Step1: Recall function notation rules

Function notation for $y$ as a function of $x$ is $y=f(x)$, where $x$ is the input, $y$ is the output.

Step2: Match given values to notation

Given $x=3$, $y=5$, substitute into $y=f(x)$: $f(3)=5$.

Answer:

E. $f(3) = 5$