Question

Which of the following does not represent a function?

Answer 1

Answer:

C. graph of an ellipse with y intercepts negative 7 and positive 7

Explanation:

An ellipse is an oval shape.  In order to represent a function, a graph must pass the vertical line test; that is, a vertical line drawn through any area of the graph must only pass through one point.  In an oval, or ellipse, a vertical line will pass through twice; this means it is not a function.