It is given that y is a function of x, and y is 5 when x is 3.

Question

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

Answer 1

To represent the information that $y$ is a function of $x$ and that $y=5$ when $x=3$ using function notation, we write:

• $f(3)=5$

This indicates that when the input to the function $f$ is 3, the output is 5.

Among the options provided, the correct representation is:

E. f(3) = 5