# What Is the Domain of a Function?

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The domain of a function is the complete set of all possible values of an independent variable in a function. Practice some examples using the domain of a function with help from a tutor and teacher in this free video on education and math.

Part of the Video Series: Math & Physics Education
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## Video Transcript

Hi my name is Samir Malik and I'm an independent tutor for middle school and high school students in the Austin area. Today we are going to be discussing the domain of a function which I have written down here. The domain of a function is the complete set of all possible values of an independent variable in a function. The domain of a function is all possible x values which make that function work. So I'm going to give you some examples of that as well in an equation. Here we have seven which is less than x which has to be less than ten. So in this equation here we know that the domain of this function is x has to equal anything greater than seven and any number less than ten to make this equation true for the domain of this function. Also the denominator of a fraction cannot be zero when calculating the domain of a function and all values under the square root must be positive when calculating the domain of the function. So these are some examples and the definition of the domain of a function.

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