It’s important to keep them in mind when trying to figure out How to tell if a graph is a function.

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How To: Given a graph of a function, use the horizontal line test to determine if the graph represents a one-to-one function. Inspect the graph to see if any horizontal line drawn would intersect the curve more than

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If we want to check whether the graph is a function or not we use the concept called vertical line test. If the vertical line drawn across at anywhere of the graph intersects the graph at most

How Do You Know If the Graph is a Function? A function always passes the vertical line test . To use this test, just take a vertical line (or just a vertical stick) and make it pass through the graph from left to right horizontally.

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Identify Functions Using Graphs

And sometimes there's something called the vertical line test that tells you whether something is a function. When it's graphically defined like this, you literally say, OK, when x is 4, if I draw a vertical line, do I

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math is the study of numbers, shapes, and patterns. It is used in everyday life, from counting to measuring to more complex calculations.