How to Define the Domain of a Graph

Series Summary

Mathematics is the body of knowledge and the academic discipline that studies concepts such as quantity, structure, space and change. Mathematics education is a term that refers both to the practice of teaching and learning mathematics, as well as to a field of scholarly research on this practice. At different times and in different cultures and countries, mathematics education has attempted to achieve a variety of different objectives, including the teaching of basic numeracy skills to students and teaching both practical and abstract mathematics. In this free video series on math skills, a private tutor explains how to solve and define a variety of math terms and equations. Get information on solving inequalities, graphing inequalities and combining like terms in polynomials. Find out how to determine the domain of a graph and how to solve for range. Learn about De Morgan's law and how to find percentages. Improve math skills today with the help of these free videos.

Video Transcript

"Hi, my name is Samir Malik. And I'm a private tutor for Middle school and High school students in the Austin area. Today, we're going to be discussing the Domain of a Graph. And how to calculate the domain of a graph. Now first of all, the domain of a graph is all the X values in a graph. So as we know, in our graphs we have. A traditional two axes graph will have the X values and the Y values. In a three axes graph, you have the X values, Y values and Z values. But what I will illustrate today, is a traditional graph. With X values and Y values. And we'll go ahead and draw a line. And we'll calculate from that, what the domain of the graph is. So we have our graph. We have the X axis, Y axis. We have the points one, two and three. We have the points one, two and three. We this, one, one. We another pint, two, two. And we have another point three, three. And we know that for X values equals one, two and three. For the Y values we have one, two and three. So the domain of this graph is going to equal one, two and three. Because the domain is all the X values of this graph. Which we have drawn. So where we're able to understand the domain of a graph. And understand the X values."