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Select the correct answer.

Which of the following sets of ordered pairs represents a function?

A. [tex]\{(-8,-14),(-7,-12),(-6,-10),(-5,-8)\}[/tex]
B. [tex]\{(-4,-14),(-9,-12),(-6,-10),(-9,-8)\}[/tex]
C. [tex]\{(8,-2),(9,-1),(10,2),(8,-10)\}[/tex]
D. [tex]\{(-8,-6),(-5,-3),(-2,0),(-2,3)\}[/tex]


Sagot :

To determine which set of ordered pairs represents a function, we need to check if each input [tex]\( x \)[/tex] in the set is associated with exactly one output [tex]\( y \)[/tex]. In other words, for the relation to be a function, each [tex]\( x \)[/tex] value must appear only once in the set of ordered pairs.

Let's analyze each set of pairs:

### Set A: [tex]\(\{(-8,-14),(-7,-12),(-6,-10),(-5,-8)\}\)[/tex]
- Examine the [tex]\( x \)[/tex]-values: [tex]\(-8, -7, -6, -5\)[/tex]
- Each [tex]\( x \)[/tex] value is unique.
- Therefore, Set A represents a function.

### Set B: [tex]\(\{(-4,-14),(-9,-12),(-6,-10),(-9,-8)\}\)[/tex]
- Examine the [tex]\( x \)[/tex]-values: [tex]\(-4, -9, -6, -9\)[/tex]
- Notice that the [tex]\( x \)[/tex] value [tex]\(-9\)[/tex] appears twice, with different [tex]\( y \)[/tex]-values [tex]\(-12\)[/tex] and [tex]\(-8\)[/tex].
- Therefore, Set B does not represent a function.

### Set C: [tex]\(\{(8,-2),(9,-1),(10,2),(8,-10)\}\)[/tex]
- Examine the [tex]\( x \)[/tex]-values: [tex]\(8, 9, 10, 8\)[/tex]
- Notice that the [tex]\( x \)[/tex] value [tex]\(8\)[/tex] appears twice, with different [tex]\( y \)[/tex]-values [tex]\(-2\)[/tex] and [tex]\(-10\)[/tex].
- Therefore, Set C does not represent a function.

### Set D: [tex]\(\{(-8,-6),(-5,-3),(-2,0),(-2,3)\}\)[/tex]
- Examine the [tex]\( x \)[/tex]-values: [tex]\(-8, -5, -2, -2\)[/tex]
- Notice that the [tex]\( x \)[/tex] value [tex]\(-2\)[/tex] appears twice, with different [tex]\( y \)[/tex]-values [tex]\(0\)[/tex] and [tex]\(3\)[/tex].
- Therefore, Set D does not represent a function.

In summary, only Set A meets the criteria for being a function.

Thus, the correct answer is:
A. [tex]\(\{(-8,-14),(-7,-12),(-6,-10),(-5,-8)\}\)[/tex]