### Home > AC > Chapter 11 > Lesson 11.3.1 > Problem11-101

11-101.

What number is not part of the domain of $f ( x ) = \frac { 3 } { x + 5 }$? How can you tell?

What x-value(s) would not produce a possible output (y-value)?

We cannot divide by $0$. Therefore, what value of $x$ will make the denominator $0$?

$x$ cannot equal $−5.$