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Unit 5

Proportional Relationships

TermDefinition
coordinate plane A plane containing a horizontal number line, x-axis, and a vertical number line, y-axis, that intersect at their zero points called the origin.
x-axis The horizontal axis in a coordinate plane.
y-axis The vertical axis in a coordinate plane.
origin The intersection of the x-axis and y-axis in a coordinate plane that has the coordinates (0,0).
quadrant One of the four regions into which the x-axis and y-axis divide the coordinate plane.
ordered pair A pair of numbers that can be used to locate a point on a coordinate plane.
interpret Explain the meaning of.
relate A component of a given set is associated with a component of another set.
proportional When two quantities always have the same relative size and therefore the same ratio.
equivalent Equal in value.
unit rate A ratio in which the second term's quantity is ONE unit.
constant rate of proportionality The constant value of the ratio of two proportional quantities.
constant Occurring continuously over a period of time.
diagram A drawing used to describe something.
variable A letter or symbol used to represent an unknown quantity.
substitute Placing a number in place of a variable.
direct variation Mathematical relationship between two variables that can be expressed by an equation in which one variable is equal to a constant times the other variable.
predict To estimate that a specific thing will happen in the future or will be a consequence of something.
Created by: Mrs Ott
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