Question

Use the domain and range of each of the following relations to determine which is a function.

Answer 1

Answer:

b. is the only set of points that is a function.

Step-by-step explanation:

A relation is a function is there is not more than one y assigned to a x.

A relation relates a variable to another variable. Option a does not not this.

A set of points is a relation. A trick to figuring out if is a function is to see if all x's are different.

Let's look at b. All the x's are different there so it is a function.

Now c, we see that there are two different points with the same x so this is not a function.

Now d, we see that there are two different points with the same x so this is not a function.