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Which of theses graphs represent a function

Which of theses graphs represent a function-example-1
User LaKraven
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4 votes

Answer:

W only

Explanation:

A function outputs for every point in the domain (horizontal axis or part of it) one and only one value of y. The easiest way to find out which one is a function is to grab a pen, or a ruler, or the edge of a piece of paper, put it parallel to the y axis, and scan the graph. if you touch your graph more than once (zero is still fine! means the function doesn't exist there) you're not dealing with a function.

User Xerillio
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