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# Algebra 1 Chapter 6

### McDougal Littell

Graph of linear inequality in one variable The set of points on a number line that represents all solutions of the inequality.
Equivalent Inequalities Inequalites with the same solutions.
Compound Inequality Two inequalites connected by and or or.
Linear inequality in x and y An inequality that can be written as follows: ax+by>c ax+by
Solution of a linear inequality An ordered pair (x,y) is a solution of a linear inequality if the inequality is true when the values of x and y are substituted into the inequality.
Graph of a linear inequality in two variables The graph of all ordered pairs (x,y) that are solutions of the inequality.
Half-plane In a coordinate plane, the region on either side of a boundary line.
Stem-and-leaf plot An arrangment of digits that is used to display and order numerical data.
Measure of central tendency A number that is used to represent a typcial number in a data set.
Mean, or average The sum of n numbers divided by n.
Median The middle numbers of a collection of n numbers are written in a numnerical order. If n is even, the median is take to be the average of the two middle numbers.
Mode The number that occcurs most frequently in a collection of n numbers. A set of data can have more than one mode or no mode.
Box-and-whisker plot A data display that divides a set of data into four parts. The box represents half of the data. The segment extends to the least and greatest data items.
Quartiles Three numbers that separate a set of data into four parts.
Created by: dhmahlman