Which of the following does not represent a function?

graph of a sine wave function
graph of a line with a negative slope and a y intercept of negative 5
graph of a positive parabola oriented about the y axis with y intercept negative 5
graph of an absolute value function oriented about the x-axis

Question

Which of the following does not represent a function?
 	
	graph of a sine wave function
	graph of a line with a negative slope and a y intercept of negative 5
	graph of a positive parabola oriented about the y axis with y intercept negative 5
	graph of an absolute value function oriented about the x-axis

mrnood · Answer

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A function of x has only one value of y for each value of x

look at the graphs I sketched.