Question

Determine which relation is a function.

Answer 1

"A function is a special relationship between values: Each of its input values gives back exactly one output value."
so therefore look for a graph that dosen't repeat values for x or y

Answer 2

ik but i cant tell with these ones

Answer 3

1.gif is not function because x always be 3
3.gif is not function because x and y have 2 values :like (1,2)(1,-2),(2,1)(2,-1)
4.gif is not function because x have 2 values :f-1(x) not f(x) it's inverse funtion or function of Y ( f(y)=x )

Answer 4

so its 2

Answer 5

????????

Answer 6

yep 2.gif look like y=x^3 so that's function