Refer to the following graphs to determine an appropriate response.
-Which is not the graph of a function? What is its equation?
A) graph B; $x = y ^ { 2 }$
B) graph $C ; y = \sqrt { x }$
C) graph A; $y = x$
D) graph D; $y = [ [ x ] ]$

Question

Refer to the following graphs to determine an appropriate response. 
-Which is not the graph of a function? What is its equation?
A) graph B; $x = y ^ { 2 }$ 
B) graph $C ; y = \sqrt { x }$ 
C) graph A; $y = x$ 
D) graph D; $y = [ [ x ] ]$

Quizplus · Accepted Answer

The equation $x = y^2$ does not represent a function because for a given x-value, there can be two different y-values (one positive and one negative square root), violating the definition of a function where each input should map to exactly one output.

Refer to the Following Graphs to Determine an Appropriate Response x=y2x = y ^ { 2 }x=y2

Refer to the Following Graphs to Determine an Appropriate Response $x = y ^ { 2 }$