Which of the following sets represents a function? {(3, 5), (-1, 7), (3, 9)} {(1, 2), (3, 2), (5, 7)} {(1, 2), (1, 4), (1, 6)}

The 1st set has 5 different values of +y+
for +x+=+1+ and violates definition

The 2nd set is a function

The 3rd set has

( 1,2 ) & ( 1,1 )
( 2,3 ) & ( 2,2 )
( 3,4 ) & ( 3,3 )
Each of these pairs violates the definition

The 4th set has ( 2,-7 ) & ( 2,0 ) which
violate definition

{(1, 2), (3, 2), (5, 7)} I think that is right.

5días gucgivuzu 32 horas y horas 6y t7