Question

Does the table represent a function? Why or why not?
4
5
NWNWOX
5
7
9
A. No, because one x-value corresponds to two different y-values.
O B. Yes, because every xvalue corresponds to exactly one y value.
O C. No, because two of the y-values are the same.
O D. Yes, because there is the same number of x-values as y-values.

Answer 1

Answer:

Let's put the chart into ordered pairs:

(x, y)

(2,1)

(3,4)

(3,3)

(4,2)

(5,5)

In bold, we see that there are two y-values at x=3. This means that this relation fails the vertical line test (two points on the same verticle line). This is not a function. 

The answer options may be mis-written. 

The answer is no, because one x value corresponds to more than one y-value.