Question

What coordinate needs to be removed for this graph to be a function? A (-3,5) B (1, -3) they C (3, 2) D (2, 1)

Answer 1

we know that

A function is a binary relation over two sets that associates every element of the first set, to exactly one element of the second set

that means

For one value of x , there is only one value of y

In this problem

we have the points

(3,2) and (3,4)

so

For one value of x we have two values of y

therefore

you need to remove (3,2) or (3,4)

The answer is the option C