###### Carl Horowitz

University of Michigan
Runs his own tutoring company

Carl taught upper-level math in several schools and currently runs his own tutoring company. He bets that no one can beat his love for intensive outdoor activities!

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# Domain and Range - Problem 3

Carl Horowitz
###### Carl Horowitz

University of Michigan
Runs his own tutoring company

Carl taught upper-level math in several schools and currently runs his own tutoring company. He bets that no one can beat his love for intensive outdoor activities!

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It's important that you guys are able to find the domain and range from a graph. Sometimes you're given little splattering of points like this, in which case you can find the domain and range pretty easily. Keeping in mind the domain is the set of all x numbers. So if I want to find the domain, I just want to look at the x values. [-1, 0, 2]. It doesn't matter what order I put them in. There's my domain.

Range is the set of all our numbers. So I'll have [-2, 2, 1]. It's just the y values from those points. That's it.

When you're asked to find domain and range and you're given a few discrete points, discrete meaning like separated from each other, just look at the coordinates. Find the x numbers, those are your domain, find the range numbers, those are your y's. It's not so bad.