Question

QUESTION 1
Select the expression that represents a rational function.

Answer 1

`y=(5)/(x+3)`

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=(p(x))/(q(x)) \\ \\ Whenever \ q(x) \\eq 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.