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# Chapter 7 Math Vocab

Graph the point in the plane
x-axis the horizontal number line
y-axis the vertical number line
Ordered Pair if x=4 and y=7 they can be written as (4,7)
Abscissa the first number in an ordered pair
Ordinate the second number in an ordered pair
Coordinates the abscissa and ordinate
Cartesian Coordinate System the whole system- x-axis, y-axis, points in the plane
Quadrants the axes divide the graph paper into four regions called
Scale a number placed every so many units
Solution an ordered pair that makes the equation a true statement
Y Intercept the value of y when x is 0
X Intercept the value of x when y is 0
Rise in going from one point to another in a Cartesian Coordinate System, the rise is the change in y
Run in going from one point to another in a Cartesian Coordinate System, the run is the change in x
Slope the slope of a line is the ratio
Slope-Intercept Form an eqution of the form y= mx+b, where m and b are constants, is in slope-intercept form.
Slope of Horizontal Lines horizontal lines have 0 for a slope
Slope of Vertical Lines vertical lines do not have a slope
Point-Slope Form an equation in the form y - y= m(x - x) is said to be in point-slope form. the slope is m, and a fixed point on the line is (x,y). the variables x and y stand for coordinates of a variable point on the line
Equation of Horizontal Lines if y= constant, the graph is a horizontal line
Equation of Vertical Lines if x= constant, the graph is a vertical line
System of Equations two or more equations with the same variables
Solution of a System an ordered pair that satisfies all the equations in the system
Substitution a method of solving a system of equations by solving one equation to get one of the variables and substituting the result in the other equation
Simultaneous Equations equations in a system that can be solved at the same time
Linear Combination what you get by multiplying each quantity by a constant, then adding the results. the method is also called addition-subtraction
Created by: ianmorris