Hurry points first 2 and hurry plz have a good day /night Which set of ordered pairs represents a function?

{(2, –2), (1, 5), (–2, 2), (1, –3), (8, –1)}
{(3, –1), (7, 1), (–6, –1), (9, 1), (2, –1)}
{(6, 8), (5, 2), (–2, –5), (1, –3), (–2, 9)}
{(–3, 1), (6, 3), (–3, 2), (–3, –3), (1, –1)}

2nd choice

Step-by-step explanation:

1) I can see that the x-input a repeated but has a different y-output.

2) None of the x-inputs repeated,  y-outputs repeated, a function is when two if the same x-inputs have the same y-output, so y-outputs can be repeated with different x-inputs but the reverse if false.

3) And again there and two -2 input with different out puts so its not a function.

4) -3 repeated with different outputs so its not a function

hope this helps you :)  

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

0.6

39mph

step-by-step explanation: