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Which set of ordered pairs does not represent a function?

{(-4,-3),(-7,9),(7,-8),(-4,6)}

{(-5,-4),(5,3),(-4,-7),(3,4)}

{(-4,8),(0,8),(9,-3),(4,9)}

{(2,-7),(-6,7),(-8,7),(-5,-5)}

Which set of ordered pairs does not represent a function?\newline{(4,3),(7,9),(7,8),(4,6)} \{(-4,-3),(-7,9),(7,-8),(-4,6)\} \newline{(5,4),(5,3),(4,7),(3,4)} \{(-5,-4),(5,3),(-4,-7),(3,4)\} \newline{(4,8),(0,8),(9,3),(4,9)} \{(-4,8),(0,8),(9,-3),(4,9)\} \newline{(2,7),(6,7),(8,7),(5,5)} \{(2,-7),(-6,7),(-8,7),(-5,-5)\}

Full solution

Q. Which set of ordered pairs does not represent a function?\newline{(4,3),(7,9),(7,8),(4,6)} \{(-4,-3),(-7,9),(7,-8),(-4,6)\} \newline{(5,4),(5,3),(4,7),(3,4)} \{(-5,-4),(5,3),(-4,-7),(3,4)\} \newline{(4,8),(0,8),(9,3),(4,9)} \{(-4,8),(0,8),(9,-3),(4,9)\} \newline{(2,7),(6,7),(8,7),(5,5)} \{(2,-7),(-6,7),(-8,7),(-5,-5)\}
  1. Define Function: A function is defined as a relation where each input ( extit{x}-value) has exactly one output ( extit{y}-value). To determine which set of ordered pairs does not represent a function, we need to check if there are any repeated extit{x}-values with different extit{y}-values in each set.
  2. Check First Set: Let's examine the first set: {(4,3),(7,9),(7,8),(4,6)}\{(-4,-3),(-7,9),(7,-8),(-4,6)\}\newlineWe can see that the xx-value 4-4 appears twice with different yy-values (3-3 and 66). This violates the definition of a function, where each xx-value must be associated with exactly one yy-value.
  3. Check Second Set: Now let's check the second set: {(5,4),(5,3),(4,7),(3,4)}\{(-5,-4),(5,3),(-4,-7),(3,4)\}\newlineIn this set, all xx-values are unique, so this set does represent a function.
  4. Check Third Set: Next, we examine the third set: {(4,8),(0,8),(9,3),(4,9)}\{(-4,8),(0,8),(9,-3),(4,9)\} All xx-values in this set are also unique, so this set represents a function.
  5. Check Fourth Set: Finally, let's look at the fourth set: {(2,7),(6,7),(8,7),(5,5)}\{(2,-7),(-6,7),(-8,7),(-5,-5)\} All xx-values in this set are unique as well, which means this set represents a function.
  6. Identify Set Without Function: Since the first set is the only one with repeated xx-values that have different yy-values, it is the set that does not represent a function.

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