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Identify the domain and range of each graph

Can somebody pls explain to me what the teacher is doing on this example problem....!! ​

Identify the domain and range of each graph Can somebody pls explain to me what the-example-1

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Answer:

Explanation:

You didn't mark your graph but I'm assuming the point is (1,2)

You notice how the function stops at the point? x and y can not be above that point because there is no line above it.

The domain of the function means what can x possibly be.

The maximum value of x in this function is 1 because that's the x value of the point where the function ended. This means x can at most be one or x≤1. So the domain is x≤1.

The range of the function means what can y possibly be.

The maximum value of y in this function is 2 because that's the y value of the point where the function ended. This means y can at most be two or y≤2. So the range is y≤2.

User Roger Liu
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