Question

Which of the following relations is a function?
Answer
a.{(-4, 3), (-4, 2), (1, 9), (6, 7)}
b.{(0, 0), (0, 1), (2, 3), (4, 5)}
c.{(-4, 3), (-2, 0), (2, 7), (3, 9)}
d.{(2, 1), (4, 2), (2, 3), (8, 4)}

Answer 1

The one in which the x value doesn't repeat.

Answer 2

For example the first one has -4 repeating two times in the x values ---> (-4,3) and (-4,2)
so it isn't a function

Answer 3

then the anser is C.

Answer 4

Yep