Question

Determine which relation is a function.

A.
{(–5, 1), (–5, 0), (–2, 1), (–1, 4), (6, 2)}

B.
{(–5, 1), (–2, 0), (–2, 2), (3, 4), (6, 2)}

C.
{(–5, 1), (–2, 0), (–1, 1), (2, 4), (6, 3)}

D.
{(–5, 3), (–2, 0), (–1, 2), (6, 4), (6, 3)}

Answer 1

which function assigns a unique y value for each x value?

Answer 2

D?

Answer 3

nope, keep trying

Answer 4

A

Answer 5

think carefully: which function does not assign one x value to multiple y values?

Answer 6

C

Answer 7

yes, that is the correct answer, but do you understand why?

Answer 8

Tbh I I Get Some Of It But Not All

Answer 9

can you tell me why b is wrong?

Answer 10

Is It Becuase Of The 2's

Answer 11

not quite, you're looking at the wrong coordinates (you should be looking for duplicate x-coordinates)

Answer 12

so if it had to many of the same numbers would it be wrong

Answer 13

not exactly, if the same x value gets assigned to different y values, then it wouldn't be a function

x = -2 gets assigned to two different y values so b is not a function