Question

Why the relation is or is not a function? {(-5, 7), (-2, -1), (0, 3), (4, 7)}?

Answer 1

Also, (8, -4), (-2, 0), (1, 3), (-2, 6)? Please explain why or why not for both of them, thanks.

Answer 2

if any of the first numbers repeat, then not a function
if the first numbers are all different, then it is a function

Answer 3

if the domain or the x or the first number in teh order par repeats it is not a function

Answer 4

so the first is a function and teh second is becasue -2 repeats in teh second

Answer 5

Thanks.