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# Math 7

### Chapter 1

TermDefinition
Complex Fraction A fraction a/b where a and b are fractions and b does not equal zero
Constant of Proportionality A constant ratio or unit rate of two variable quantities. It also is called the constant of variation
Constant of Variation The constant ratio in a direct variation. It is also called the constant of proportionality
Coordinate Plane A plane in which a horizontal number line and a vertical number line intersect at their zero points
Cross Products The product of the numerator of one ratio and the denominator of the other ratio. The cross products of any proportion are equal
Dimensional Analysis The process of including units of measurement when you compute
Direct Variation The relationship between two variable quantities that have a constant ratio
Equivalent Ratios Two ratios that have the same value
Nonproportional The relationship between two ratios with a rate or ratio that is not constant
Proportional The relationship between two ratios with a constant rate or ratio
Ordered Pair A pair of numbers used to locate a point in the coordinate plane. An ordered pair is written in the form (x-coordinate, y-coordinate)
Origin The point at which the x-axis and y-axis intersect in a coordinate plane. The origin is (0,0)
Quadrants One of four regions into which the two perpendicular number lines of the coordinate plane separate the plane
Rate A ratio that compares two quantities with different kinds of units
Rate of Change A rate that describes how one quantity changes in relation to another. A rate of change is usually expressed as a unit rate
Slope The rate of change between any two points on a line. It is the ratio of vertical change to horizontal change. The slope tells how steep the line is
Unit Rate A rate that is simplified so that is has a denominator of 1
X-axis The horizontal number line in a coordinate plane
Y-axis The vertical number line in a coordinate plane
Created by: mbarkley