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

Any candidate which couples the same value of x with different values of y is not a function.

Answer 2

For example, this is not a function: {(1,1),(1,2),(2,3),(3,4),(4,5)}

Answer 3

Yup! For example...

(5, 2), (5, 3)

This is not a function. The x value (in this case, 5) can't be "equal" to both 2 and 3.

Answer 4

ohhh i see now, thanks(:

Answer 5

You're welcome! :)