Question

Determine which relation is a function.

a. {(–4, 3), (–2, 3), (–1, 2), (2, 5), (3, 2)}
b. {(–4, 1), (–2, 3), (–2, 1), (–1, 5), (3, 2)}
c. {(–4, 1), (–2, 3), (–1, 2), (3, 5), (3, 2)}
d. {(–4, 1), (–2, 3), (–1, 1), (–1, 5), (3, 2)} open study

Answer 1

answer choice a is a function because none of its x values repeat at all.  There is only one -4 in the function.  and same with all the x values

Answer 2

Letter A is the function because the input has exactly 1 output