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

Answer 1

(-4,1), (1, -9) and (-2,-2) are just three distinct points.

They are not a function as such, but they could be used to define a function.

Let #D# be the set {-4, -2, 1}. This is the domain of the function.
Define #f:D->ZZ# by the explicit mapping: #f(-4)=1# #f(-2)=-2# #f(1)=-9#
The range #R# of the function #f# is the set {-9, -2, 1} of values in #ZZ# which #f(x)# takes for #x# in #D#.
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Answer 2
Yes, the set #{(-4,1), (1,-8), (-2,-2)}# is a function.

A function is a set of ordered pairs in which no two pairs have the same first element and different second elements.

This definition, in a way, tells us how a collection of ordered pairs call fail to be a function.

The set you asked about has no two pairs with equal first and different second elements. So it is a function.

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Answer 3

Yes, the set of points (-4,1), (1,-8), (-2,-2) forms a function as each x-value (input) corresponds to a unique y-value (output).

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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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