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# ch.2 math

### math

TermDefinition
Ordered pair A pair of numbers (x.y) used to locate a point in a coordinate plane. The first number is the x-coordinate, and the second number is the y-coordinate.
Coordinate Plane A coordinate plane is formed by the intersection of a horizontal number line, usually called the x- axis, and a vertical number line, usually called the y-axis
X-axis The horizontal number line in a coordinate plane.
Y-axis The vertical number line in a coordinate plane.
X-coordinate The first coordinate in an order pair, which indicates how many units to move to the left or right from the origin.
Y-coordinate The second coordinate in an order pair, which indicates how many units to move up or down from the origin.
Linear equation An equation whose graph is a line.
Solution of a linear equation All of the points on a line.
Slope A ratio of the change in y(the rise)to the change in x(the run) between any two points on a line. It is a measure of the steepness of a line.
Rise The change in y between two points on a line.
Run The change in x between two points on a line.
Slope- Intercept form An equation written in the form y=mx+b. The slope of the line is m and the y-intercept of the line is b.
X-intercept The x-coordinate of the point where a line crosses the x-axis
Y-intercept The y-coordinate of the point where a line crosses the y-axis
Standard form A linear equation written in the form ax+by=c, where a and b are not both zero.
System of Linear equations A set of two or more linear equations in the same variables
Solution of a system of linear equations An ordered pair that makes each equation in a system of linear equations true.
Created by: Morgangoff34