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What is the domain and range of #f (x) = 2x + 3#?

Answer 1

Avery Alexander

#D: {x inRR}#
#R: {y inRR}#

This is just a linear function. I know this because the degree of the #x#-variable is #1#.

Domain and range are sets of possible values the function can have - though not necessarily at the same time.

Thus, there are no restrictions to the domain and range unless context is given.

Therefore, the domain and range is:

#D: {x inRR}# #R: {y inRR}#

If we were to graph this function, we would get a straight line.

graph{2x+3 [-10, 10, -5, 5]}

As you can see, there is no restriction to the possible values.

Hope this helps :)

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Answer 2

Ethan Adkins

Domain: All real numbers Range: All real numbers

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.