18 Which relation represents a function?
(1) {(0,3), (2,4), (0,6)}
(2) {(−7,5), (−7,1), (−10,3), (−4,3)}
(3) {(2,0), (6,2), (6,−2)}
(4) {(−6,5), (−3,2), (1,2), (6,5)}

Question

18 Which relation represents a function?
(1) {(0,3), (2,4), (0,6)}
(2) {(−7,5), (−7,1), (−10,3), (−4,3)}
(3) {(2,0), (6,2), (6,−2)}
(4) {(−6,5), (−3,2), (1,2), (6,5)}

jim_thompson5910 · Answer

A relation is only a function when each x value is paired with exactly one y value

Something like  {(2,0), (6,2), (6,−2)} is NOT a function because x = 6 is paired with y = 2 and y = -2 at the same time

anonymous · Answer

Oh, ok. I get you.

So...not choice 1....not choice 3...not choice 2...AHA!

Thus choice 4!!! Thanks Jim!

jim_thompson5910 · Answer

you nailed it, nice job