Question

NEED HELP!!! MATH
Please don't give answers just help me through it...

Determine whether the following relation is a function.
(3,7),(3,8),(3,-2),(3,4),(3,1)
A. It is a function because the ordered pairs all have the same x-value.
B. It is not a function because there are multiple y=values paired with a single x-value.
C It is a function because none of the ordered pairs have the same y=value.
D It is not a function because none of the pairs have the same y=value.

Answer 1

A function is a set of ordered pairs in which no two ordered pairs have the same first number.

Answer 2

a relation is a function when there is only one output (y-value) for any given input (x-value)
you can also check with a vertical line test
for a given x value if the graph crosses the vertical line x= given value more than once then you do not have a function
see the sketch below