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# CH.2 MATH

TermDefinition
ordered pair a pair of numbers used to locate a point in a coordinate plane. the first number is the y-coordinate.
coordinate plane a plane is formed by the intersection of a horizontal number line, usually called the x-axis, ans a vertical number line, usually called the y-axis.
x-axis the horizontal number in a coordinate plane.
y-axis the vertical number line in a coordinate plane.
x-coordinate the first coordinate in an ordered pair, which indicates how many units to move to the left or right from the origin.
y-coordinate the second coordinate in an ordered 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 a value that make an equation true.
slope a ratio of the change in y to the change between any two points on the 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 m and y int of the line is b.
x-intercept the x coordinate of the point where a line crosses the x axis
y-intercept the vertical number line in a coordinate plane.
standard form a linear equation written in the form ax + by = c, where a and b are not both zero.
systems of linear equations a set two or more linear equation in the same variables.
solutions of a systems of linear equations an ordered pair that makes each equation in a system of linear equation true.