Which two sets of ordered pairs represent a function ?

Second option.

Fifth option.

Step-by-step explanation:

By definition, a relation is a function only if each input value (each x-value) has one and only one output value (y-value).

Knowing this, we can check each set of ordered pairs given in the picture:

First option: Notice that the input value has two output values ( and ), and the input value has two output values ( and ); therefore this set of ordered pairs does not represent a function.

Second option: Observe that each input value has one output value; therefore this set of ordered pairs represents a function.

Third option: Notice that the input value has two output values ( and ), and the input value also has two output values ( and ). Therefore this set of ordered pairs does not represent a function.

Fourth option: Since  all the ouput values belong to the input value , we can conclude that this set of ordered pairs does not represent a function.

Fifth option: Observe that each input value has one output value; therefore this set of ordered pairs represents a function.

the difference between a number and 5 is -2.

step-by-step explanation:

notice that the equation you are given has -2 (negative 2) on the right side, not 2. when you subtract 5 from a number n, you are finding the difference between the number and 5.

the difference between a number and 5 is -2.