Question

Which of the following is a function?

Answer 1

Answer:  C

Step-by-step explanation:

In order to be a function, you canNOT have any duplicate x's.

A) x = -2, 6, 6, 10      --> 6 is used twice so it is not a function

B) x = -2, 10, 6, 10    --> 10 is used twice so it is not a function

C) x = -2, 1, 6, 10      --> all the x's are different.  This is a function!!!

D) x = -2, 1, 6, 1        --> 1 is used twice so it is not a function

Answer 2

Answer:

C

Step-by-step explanation:

Relationship between independent variable and dependent variable: each x corresponds to only one y, but y can each correspond to multiple x (which is why there are multiple solutions of an equation, and a solution can only launch a counter-argument )

A, 6 -> - 3,22.6 (x) corresponding to the two y. C options and only one for each of x y.