October 15, 2008

This resource has been contributed by Winpossible, and can also be accessed on their website by clicking here - Finding the domain and range of an equation.

It explains how to determine the domain and range of a given equation by setting up the tabular values. In the tabular set up, you should plug in the values for x to get the resulting values of y, and then make a general statement about the domain from the x values and about the range from the y values. For example, to determine the range and domain of the function f(x) = –x^{4} + 4, we plug in some values for x and calculate y. You will see that there is no restriction on x so the domain is all real numbers and there is a restriction on y such that the range is always going to be less than or equal to 4 (because -x^{4} is always going to be negative for any real number x), and hence the range is f(x) ? 4.

It explains how to determine the domain and range of a given equation by setting up the tabular values. In the tabular set up, you should plug in the values for x to get the resulting values of y, and then make a general statement about the domain from the x values and about the range from the y values. For example, to determine the range and domain of the function f(x) = –x

This FREE mini-lesson is a part of Winpossible's online course that covers all topics within Algebra I. Click on the video below to go through it. If you like it, you can buy our online course in Algebra I by clicking here.

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