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What is the domain of the function in the graph?

What is the domain of the function in the graph?-example-1
User Klijakub
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2 Answers

4 votes

Answer: Choice B)
7 \le r \le 12

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Step-by-step explanation:

The domain is the set of allowed x inputs of a function.

How far to the left can we go on this red line? That would be x = 7.

How far to the right? That would be x = 12.

We can have x equal anything between 7 and 12, including both endpoints. We include the endpoints because they are filled in circles (as opposed to open holes).

So the domain is
7 \le x \le 12. If we replace x with r, then we update that inequality into
7 \le r \le 12. This replacement happens because r is along the horizontal x axis.

User Michael Anckaert
by
8.3k points
4 votes

Answer:

7≤r≤12

Step-by-step explanation:

The domain is the values that the input takes

The input goes from 7 to 12

7≤r≤12

User Nikolay Kasyanov
by
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