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In mathematics, the horizontal line test is a test used to determine whether a function is injective ... (because they lie on the line y = c {\displaystyle y=c} y=c ) but different x values, which by definition means the function cannot be injective.


The usage of the inter-related terms horizontal and vertical as well as their symmetries and ... Girard Desargues defined the vertical to be perpendicular to the horizon in his Perspective of ... A horizontal line is any line normal to a vertical line.


In geometry, a horizontal line is one which runs from left to right across the page. It comes from the word 'horizon', in the sense that horizontal lines are parallel to ...


Definiton and equation for a horizontal line in coordinate geometry.


DEFINITION of 'Horizontal Line'. In finance and economics, a horizontal line is usually the X axis in a data plot. It is a line that appears to proceed from left to right ...


It's a horizontal line! And just like the horizon, horizontal lines go straight left and right. ... definition; horizontal; graph; graphical; equation; horizontal; flat ...


In this lesson, we will learn about horizontal lines. What properties are unique to horizontal lines? How do you recognize the graph or equation...


Definition of. Horizontal. Horizontal. Going side-to-side, like the horizon. Parallel to the horizon. (Up-down is called vertical). See: Vertical ...


What are the properties of a horizontal line, and a vertical line. Complete information about a horizontal line and a vertical line.