Question

Which relation is a function?
A. {(1, 2), (1, 5), (1, -1), (1, 4)}
B. {(8, -1), (2, -1), (3, 8), (2, 5}
C. {(-3, 4), (-2, 5), (0, 9), (0, 12)}
D. {(7, 12), (1, -5), (3, -10), (2, -5)}
Someone please help ill give fan + medal!

Answer 1

function is where for each x value only 1 y value corresponds. there cannot be 2 or more same x values

Answer 2

Im still confused

Answer 3

the coordinates are (x, y). find the relation where no x value repeats

Answer 4

what are the x values?