Question

Which set of ordered pairs represents a
function?
{(6,8),(-4,2), (-7,4), (-7,8)}
{(0,9), (3,5), (0, -4), (6,2)}
{(6,0), (-7,2), (4, 8), (9,2)}
o {(-5,5), (0, -3), (-5, -2), (6,8)}
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help me please

Answer 1

keeping in mind that a function is a set that has no X-repeats, namely the x-coordinate on every pair is never repeated, let's check these ones.

Check the picture below.