Definition: Abscissa, in mathematics, refers to a point on a number line where a coordinate system crosses an x-axis, where x is represented as distance from 0 unit on the y-axis.
Here are some key definitions:
1.
Coordinates
: The coordinates (x, y) of a point are a pair of numbers that describe its position along a number line. For example, the point with coordinates (2,3) is located at the origin (0,0).
2.
Axis
: In a coordinate system, the x-axis is horizontal and runs from left to right, while the y-axis is vertical and runs up to down. The axis divides the plane into four quadrants based on its orientation.
3.
Point
: A point is an object that has fixed coordinates (x and y) in one of the four quadrants.
4.
Coordinate system
: A coordinate system is a mathematical tool that uses numbers as reference points to describe and locate positions, dimensions, or other quantities.
5.
Distance
: The distance between two points on a number line is calculated using the formula: `d = |x2 - x1| / (y2 - y1)`, where d is the distance, x1 and x2 are the coordinates of the first point, and y1 and y2 are the coordinates of the second point.
6.
Slope
: The slope of a line is a measure of its steepness. It indicates how much one point moves for each unit in the horizontal direction (x-coordinate) or vertical direction (y-coordinate).
7.
Equation of a Straight Line
: A straight line is defined by two points on it, which are called "coordinates" and called "vertices". The equation of a straight line in standard form (Ax + By + C = 0), where A, B, and C are integers or fractions, is given by:
A(x - x1)² + B(y - y1)² + C = 0
In the above equation, (x1, y1) are the coordinates of a vertex, and A, B, and C are constants.
8.
Equation of an Oblique Line
: The slope-intercept form of a line is:
y = mx + b
where m is the slope of the line and b is the y-coordinate at any point on the line. This equation can be used to find the x- and y-coordinates for any point on the line.
In summary, abscissas refer to coordinates or positions in a number line. They represent the distance between two points along the coordinate axis and are used when describing the position of an object or figure along the plane. The word "abscissa" refers to the horizontal distance from the x-axis, which is often denoted as 0 in this context.
abscissas