A relation is given below.

{(0, 0), (2, 0.5), (4, 1), (3, 1.5), (4, 2), (5, 1.5), (6, 8)}

Which ordered pair can be removed to make this relation a function?

Why would removing this ordered pair make the relation a function?

1 answer

To determine which ordered pair can be removed to make the relation a function, we need to understand the definition of a function. A relation is a function if every input (or first element of the ordered pair) has exactly one corresponding output (or second element).

Now, let's examine the ordered pairs in the given relation:

  • (0, 0)
  • (2, 0.5)
  • (4, 1)
  • (3, 1.5)
  • (4, 2)
  • (5, 1.5)
  • (6, 8)

From this list, we see that the input "4" appears twice:

  1. (4, 1)
  2. (4, 2)

Since the input "4" has two different outputs (1 and 2), this violates the definition of a function.

To make this relation a function, we can remove either (4, 1) or (4, 2).

Removing (4, 1): The resulting relation would be: {(0, 0), (2, 0.5), (4, 2), (3, 1.5), (5, 1.5), (6, 8)}

Removing (4, 2): The resulting relation would be: {(0, 0), (2, 0.5), (4, 1), (3, 1.5), (5, 1.5), (6, 8)}

In either case, the input "4" would only be associated with one output, which satisfies the condition for being a function.

Conclusion: Removing either (4, 1) or (4, 2) will make the relation a function because it ensures that each input has only one corresponding output.

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