# Domain and Range - Concept

An important part of understanding functions is understanding their domain and range. **Domain and range** are all the possible x-values and y-values of the function, and can often be described easily by looking at a graph. In order to grasp domain and range, students must understand how to determine if a relation is a function and interpreting graphs.

The ideas of domain and range are some of

the most important math ideas that to see

in your upcoming math classes.

It's really important that you guys start

thinking about domain as the set of

all possible X values or input values and

the range as a set of all possible

Y values or output values.

And you want to be able to find the domain

and range not only from like a set

of points but also to be able to find

the domain and range from a graph

where it might just be like a little

splattering of points.

Domain and range show up in lots of different

places and that's why it's important

that you keep those two ideas

straight in your head.

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