Is (-4,1), (1,8), (-4,-2) a function?

Answer 1
No, the first elements of the pairs are not distinct, yielding two different values for #f(-4)#.
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Answer 2
#(x,y)# with #x# mapping into #y# with the set #color(white)("XXXX")##{(-4,1), (1,8), (-4,2)}# is not a function since #x=-4# maps into more than one value (it maps into both #1# and #2#).
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Answer 3

To determine if the set of points (-4, 1), (1, 8), (-4, -2) represents a function, we need to check if each x-value is associated with only one y-value.

In this case, the x-value -4 is associated with two different y-values: 1 and -2. Since an x-value cannot be associated with more than one y-value in a function, the set of points does not represent a function.

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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.

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.

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.

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.

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