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Chapter 1

Variables, Expressions, and Integers

Numerical Expression Consists of numbers and operations
Variable A letter used to represent one or more numbers
Variable Expression Consists of numbers, variables, and operations
Evaluate A variable expression, substitute a number for each variable and evaluate the resulting numerical expression
Verbal Model Describes a problem using words as labels and using math symbols to relate the words
Power Is the result of a repeated multiplication of the same factor
Base The base is the big number
Exponent The exponent is the small number in the top corner of the base
Order of Operations To evaluate expressions involving more than one operation, mathematicians have agreed on a set of rules
Integers Are the numbers...,-3, -2, -1, 0, 1, 2, 3,...(The dots indicate that the numbers continue without end in both the positive and negative directions)
Negative Integers Are integers that are less than 0
Positive Integers Are integers that are greater than 0
Absolute Value A number is its distance from 0 on the number line
Opposite They have the same absolute values but different signs
Additive Inverse The opposite of a number
Mean The sum of the values divided by the numbers of values
Median The middle value when the values are written in numerical order
Mode The value that occurs most often
Range The difference of the greatest value and the least value
Coordinate Plane Formed by the intersection of a horizontal number line called the x-axis and a vertical number line called the y-axis.
Order Pair Each point in a coordinate plane is represented by an ordered pair
Scatter Plot Uses a coordinate plane to display paired data
Created by: wainscottr01