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The Vertical Line Test for Functions:

If any vertical line intercepts a graph in more than one point, the graph does not define y as a function of x.

By the definition of a function, for each value of x we can have at most one value for y.

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Q: What is a vertical line test in math?
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Related questions

What does a vertical line test mean in math?

Absolute value |-5| = 5


What is the definition for vertical line test in the subject math?

The Vertical Line Test for Functions: If any vertical line intercepts a graph in more than one point, the graph does not define y as a function of x. By the definition of a function, for each value of x we can have at most one value for y.


What is the only type of line that is not a function?

A vertical line. Remember that one test to see if a relation is a function is the vertical line test. A vertical line would fail that of course.


What does a vertical line tell you?

A vertical line can be used to test whether or not a graph is a function.


Can a one to one function not be a function?

"y = f(x) is a function if it passes the vertical line test. It is a 1-1 function if it passes both the vertical line test and the horizontal line test. " - In order to be a one-to-one function, it first has to BE a function and pass the vertical line test. For example, a relation on a graph like a circle that does not pass the vertical line test is not function nor one-to-one.


What is a vertical symmetry in math?

a line that goes up and down


What does a straight line up and down mean in math?

Vertical


Can you determine whether the inverse of a function is a function by using vertical line test?

Not quite. You can use a vertical line test on the graph of the inverse mapping, OR you can use a horizontal line test on the original graph. The horizontal line test is used in the same way.


Does a circle pass the vertical line test?

No. Because a vertical line will pass through two points on the graph.


How can you tell if a graph sHow is a function?

Test it by the vertical line test. That is, if a vertical line passes through the two points of the graph, this graph is not the graph of a function.


What is the math symbol for incongruency?

Three vertical lines, |, with a diagonal line across them.


How do you use the vetical line test to determine a function?

f(x) = x2 This is a function by the vertical line test because a vertical line drawn through this function will only intersect the function at one point