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

A.

Step-by-step explanation:

A ordered pair is when the x-axis of each point is different (only the x-axis)

Let's look at B

B has two x-axis point that is the same: (5,5) and (6,5)

Thus B is not a function

Let's look at C

C has two x-axis point that is the same: (2,3) and (2,6)

Thus C is not a function

Let's look at D

D has two x-axis point that is the same: (2,3) and (2,6)

Thus D is not a function

So A is the answer

Hope this helps!

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step-by-step explanation: