Definition

1. Noun:
   • The horizontal axis in a plane coordinate system: The x-axis is the horizontal reference line in a two-dimensional Cartesian coordinate system. It is used to measure horizontal distance or the value of the first variable.

Usage

• The is used in mathematics, science, and engineering to graph data, functions, and relationships.
• On a standard graph, the runs left to right. Points are located based on their (distance along this axis) and (distance along the vertical y-axis).
• The point where the and y-axis intersect is called the origin.

Examples

• Noun:
  • In the equation y = 2x + 1, the variable x is plotted along the x-axis.
  • The time in seconds was displayed on the x-axis of the chart.
  • Remember to label your x-axis with the correct units.

Advanced Usage

• "x-axis intercept": The point where a graphed line or curve crosses the . At this point, the y-coordinate is zero.
  • To find the x-axis intercept, set y equal to zero and solve for x.

Variants and Related Words

• Abscissa (n): A formal term for the of a point, representing its distance from the y-axis measured parallel to the .
  • The abscissa and ordinate define a point's location.
• x-coordinate (n): The numerical value that specifies a point's horizontal position relative to the .
  • The point (5, 3) has an x-coordinate of 5.

Synonyms

• Horizontal axis: A descriptive synonym for the .
• Abscissa axis: A less common, more technical synonym.

Related Phrases

• Along the x-axis: Moving or measured in the horizontal direction.
  • The values increase steadily along the x-axis.
• Parallel to the x-axis: A line that runs in the same direction as the and never intersects it.
  • A horizontal line is parallel to the x-axis.

Noun

1. the horizontal axis in a plane coordinate system