Introduction to vertical and horizontal axis
Cartesian coordinate system specify each point
individually in plane by a pair of numerical coordinates, which are signed distances from two axis-x-axis and y-axis. Two perpendicular lines represent the two
dimensional plane and a point in the plane is defined by two parameters-its distance along x-axis from origin and its distance along y-axis from origin. X-axis is the horizontal axis and
y-axis is the vertical axis. The point where they meet perpendicularly is the origin. x-axis and y-axis are calibrated by the same scale. Any point is represented by (x,y) coordinates which
define its position on the plane.
Vertical axis- straight lines on the coordinate plane wherever all points on the line contain the similar x-coordinate.
A vertical line is individual the go directly up and down, parallel to the y-axis of the coordinate plane.
Each and every one point on the line will have the similar x-coordinate. In the figure on top of, draw either point or note down that the line is vertical while they together contain the same x-coordinate.
Example for vertical axis
Finding the equation of the two points A, B on the line are at (-16,3) and (-16,20).
The first coordinate in both pair is the x-coordinate which are -16, and -16. Because they are identical, the line is vertical.
Given that the line passes the x-axis at -16, the equation of the line is
x = -16;
This can be read as for all values of y, x is -16.
Horizontal way smooth or level.In graph x-axis represents the horizontal axis.
The blue number line in the figure lower is the x-axis, the horizontal axis.
Example for horizontal axis
Point B is 6 units to the left of point A on the horizontal axis. Find the coordinates of B if A is at (9, 7).
(9, 7) = 9 on the x-axis and 7 on the y-axis.
Point B is 6 units to the left of point A on the horizontal axis, i.e. x-axis.
So, the x-coordinate of B is 9 – 6 = 3
the coordinates of point B is (3, 7).