Question

NEED HELP ASAP!!!!!!!!!!!

Which of the following relations is a function?
A.
(6, 1), (-3, 4), (4, 1), (6, 2)

B.
(4, 0), (-3, 3), (6, 1), (-3, 5)

C.
(4, 4), (-3, 2), (6, 1), (-6, 2)

D.
(4, 4), (-3, 6), (4, 3), (-6, 2)

Answer 1

A function passes the vertical and horizontal line test. I cannot show you this- BUT put simply, there can only be one output value for each input (sounds scary but basically there can only be one x value per y value). If there are two, that’s called a jump discontinuity and the function will be undefined at that point.

Let’s look at your choices.
A) we have (6,1) and (6,2) in the answer. Remember, we can only have one x value for the y value. Two sixes=this choice out.

B) here we have two -3s, this is out.

C) looks good so far! One output per input (meaning the x values don’t repeat)

D) here we have two 4 x values. This is out.

Your answer is C. If you have any other questions let me know