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en.wikipedia.org/wiki/Vertical_bar

The vertical bar ( | ) is a computer character and glyph with various uses in mathematics, computing, and typography. It has many names, often related to particular meanings: Sheffer stroke (in logi...

www.virtualnerd.com/algebra-1/linear-equation-analysis/intercept/horizontal-vertical-lines/vertical-line-definition

In this tutorial, learn all about

www.coolmath.com/algebra/15-functions/03-vertical-line-test-01

This algebra lesson explains how to use the

www.mathsteacher.com.au/year8/ch15_graphs/05_hor/ver.htm

Plotting a horizontal line and plotting a

mathforum.org/cgraph/cslope/horizontal.html

Horizontal and

www.khanacademy.org/math/algebra-home/alg-functions/alg-recognizing-functions-ddp/v/recognizing-functions-example-2

Explaining why a

www.ixl.com/math/algebra-1/graph-a-horizontal-or-vertical-line

Fun math practice! Improve your skills with free problems in 'Graph a horizontal or

www.mathwords.com/v/vertical_line_test.htm

A test use to determine if a relation is a function. A relation is a function if there
are no

www.merriam-webster.com/dictionary/vertical line

a

mathbits.com/MathBits/TISection/General/VerticalLine.htm

It is possible to draw

Answer

More Info

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Horizontal and

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A

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Graphs, equations and properties of