A vertical number line that represents the vertical distances on a plane is called
The y-axis is a number line and it is appeared perpendicular to the surface of the earth. Hence, it is also called as vertical axis. It contains numerous equal divisions and they are denoted by both positive and negative real numbers. The divisions which denoted by the numbers represent the vertical distances. It is mainly used to measure the vertical distance of different points on a plane in Cartesian coordinate system.
The vertical y-axis has three parts.
The exact middle point of the y-axis is called origin and it is usually denoted by zero.
The region above the origin is positive region of y-axis and it is divided into numerous divisions equally and each division is denoted by a positive number.
The region below the origin is negative region of y-axis. It is also divided into numerous divisions equally but each division is indicated by a negative real number.
A, B, C and D are four points. A and C points are appeared right side to y-axis but B and D points are appeared left side to y-axis. The points A and B are in positive region and C and D are in negative region.
The number line on the y-axis is used to compare the vertical distances of all four points. The vertical distances of all four points are measured from the origin of the y-axis.
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