Which relation is a function? {(2, 3), (1, 5), (2, 7)} {(-1, 5), (-2, 6), (-3, 7)} {(11, 9), (11, 5), (9, 3)} {(3, 8), (0, 8), (3, -2)
a function will not have any repeating x values...they all have to be different...they can have repeating y values, just not repeating x values.
so ur answer is : { (-1,5), (-2,6), (-3,7) }...u see how there is no repeating x values....this is a function....the other 3 are not.