Chapter 4, Problem 19CR

To determine

To check: relation is a function or not.

Answer to Problem 19CR

Relation $S=\left\{\left(-1,7\right),\left(9,4\right),\left(3,-2\right),\left(5,3\right),\left(9,1\right)\right\}$ is not a function.

Explanation of Solution

Given:

Set (S) is

  $S=\left\{\left(-1,7\right),\left(9,4\right),\left(3,-2\right),\left(5,3\right),\left(9,1\right)\right\}$

Here input $9$ has two outputs as 1 and 4.

So, relation (S) not a function.