Which of the graphs below represent y as a function of x?
(a)
(b)

A)only (a)
B)only (b)
C)both (a) and (b)
D)neither (a) nor (b)

Question

Which of the graphs below represent y as a function of x? ​
(a)
​  (b)
​  ​
A)only (a) 
B)only (b) 
C)both (a) and (b) 
D)neither (a) nor (b)

Quizplus · Accepted Answer

A function is a relation where each x value corresponds to only one y value. In graph (a) for each x value, there is only one y value. However, in graph (b) for some x values, there are multiple y values. Therefore, only graph (a) represents y as a function of x.

Which of the Graphs Below Represent Y as a Function