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# 8th Grade Math

### 8th Grade Math Big Vocabulary

Absolute Value a numbers distance from zero
Bivariate Data In statistics, data that has two variables
Equivalent Expression two or more expressions that have the same values for all values of the variables
Irrational Number a number that cannot be expressed as a ratio of two integers or as a repeating or terminating decimal
Line of Best Fit a straight line that comes closest to the points on a scatter plot
Perfect Square a number that has integers as its square roots
Real Number a rational or irrational number
Scatter Plot A graph with points plotted to show a possible relationship between two sets of data
Scientific Notation A method of writing very large or very small numbers by using powers of 10
Square Root a number that is multiplied by itself to form a product
Diameter a line segment that passes through the center of a circle and has endpoints on the circle, or the length of that segment
Hypotenuse In a right triangle, the side opposite the right angle
Parallel Lines Lines in a plane that do not intersect
Pythagorean Theorem in a right triangle, the square of the length of the hypotenuse is equal to the sum of the squares of the lengths of the legs
Scale Factor a ratio used to enlarge or reduce similar figures
Similar figures with the same shape but not necessarily the same size
Transformation a change in the size or position of a figure
Transversal a line that intersects two or more lines
Triangle Sum Theorem The theorem that states that the measures of the angles in a triangle add up to 180 degrees
Volume The number of cubic units needed to fill a given space
Domain of a Function the set of all possible input values of a function
Function an input-output relationship that has exactly one output for each input
Like Term two or more terms that have the same variables raised to the same power
Linear Equation An equation whose solutions form a straight line on a coordinate plane
Linear Function A function whose graph is a straight line
Range of a Function the set of all output values of a function
Rate of Change a ratio that compares the amount of change in a dependent variable to the amount of change in an independent variable
Simplify to perform all possible operations, including combining like terms; to write a fraction or expression in simplest terms
Slope a measure of the steepness of a ling on a graph; the rise divided by the run
Term the parts of an expression that are added or subtracted
Created by: SSC 8th LA