Which of the following represents a function?
A.
x -5 -1 9 8 -1
y 1 7 23 17 1
B.
A graph plots the points (negative 3, negative 2), (negative 1, 1), (negative 1, negative 5), and (1, 4) on the x y coordinate.
C.
x -5 -1 9 8 -1
y 1 7 23 17 1
D.
A value negative 4 in the first ellipse corresponds to 5 in the second ellipse, a value 9 corresponds to 7, a value 13 corresponds to 3 and a value negative 7 corresponds to 5 in the second ellipse.
The function is represented by option C.
In option A, the x-value of -1 is paired with two different y-values (23 and 1), violating the definition of a function.
In option B, the x-value of -1 is paired with two different y-values (-5 and 1), violating the definition of a function.
In option D, the given information does not clearly indicate a relationship between the values in the ellipses, so it cannot be determined if it represents a function.