Question

QUESTION 1 Select the expression that represents a rational function.

Answer 1

Answer:

$y=\frac{5}{x+3}$

Step-by-step explanation:

A rational function is defined as the quotient of polynomials whenever the denominator has a degree of at least 1. Put another way, the denominator must have a variable in it. So the form of a rational function is:

$y=\frac{p(x)}{q(x)} \\ \\ Whenever \ q(x) \neq 0$

From the options:

• B and C aren't functions at all because $y$ doesn't exist. They are equations.
• D is a linear function
• A satisfies the conditions of rational functions.

So the correct option is A.