Proportional Relationships, Expressions and Percentages

percent

amount out of 100

ratio

a comparison of two numbers by division

rate

A ratio that compares two quantities measured in different units

unit rate

A rate with a denominator of 1.

proportion

two ratios that are equivalent

origin

the point (0, 0) on a coordinate grid

constant of proportionality

constant ratio between x and y (the unit rate)

y = kx

proportional equation in which k is the unit rate

factors

Numbers that are multiplied together to get a product

factoring

creating an expression by dividing out common factors

like terms

terms that are just constants or share the same type of variable

constant

A value that does not change

coefficient

A number multiplied by a variable in an algebraic expression.

product

the answer to a multiplication problem

quotient

the answer to a division problem

x-axis

the horizontal number line in a coordinate plane

y-axis

the vertical axis on a coordinate plane

interest

money added onto a loan or money earned in an account

I=Prt

simple interest formula

deposit

to put money into an account

withdraw

to take money out of an account

expression

A mathematical phrase that contains operations, numbers, and/or variables.

Distributive Property

a(b + c) = ab + ac……..a way of getting rid of ( ) using multiplication

variable

a letter used to represent an unknown number

multiples

numbers you say when you skip count. Multiples of 2 are: 2,4,6,8,…