Horizontal Axis

Definition of Horizontal Axis

Horizontal means flat or level.
Horizontal axis is the x-axis on a graph.
The blue number line in the figure below is the x-axis, the horizontal axis.


Video Examples: Acute and Obtuse Angles in Geometry


Solved Example on Horizontal Axis

Ques: Point B is 5 units to the left of point A on the horizontal axis. Find the coordinates of B if A is at (8, 7).

    Choices:
    A. (3, 7)
    B. (13, 7)
    C. (7, 8)
    D. (8, 12)
    Correct Answer: A

Solution:

    Step 1: (8, 7) ⇒ 8 on the x-axis and 7 on the y-axis.
    Step 2: Point B is 5 units to the left of point A on the horizontal axis, i.e. x-axis.
    Step 3: So, the x-coordinate of B is 8 - 5 = 3
    Step 4: The coordinates of point B is (3, 7).

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