Ratio and Proportional Reasoning

Words Notation

"On a dog, the ratio of ears to noses is two to one." Expressed in words.

Double Number Line

A model of equivalent ratios on parallel number lines.

Coordinate Plane

A plane defined by the x-axis and y-axis. Can be used to graph equivalent ratios.

Unit Price

A price per unit or how much one of something would cost.

Unit Rate

A rate with a second term of 1. "kilometers per hour" is an example.

Rate

A ratio comparing quantities of different units. The quantities are arbitrary. 240 calories per 12 ounces is an example.

Fractional Notation

A ratio expressed like a fraction is expressed in _______.

Ratio

A relationship between two quantities.

Equation

A statement that ratios are equivalent. Contains an equal sign.

Ratio Table

A table of equivalent ratios.

Proportion

A word that describes equality or inequality of ratios. If ratios are equal, they can be called "in_______."

Percent

A word that means "rate per one hundred."

Odds Notation

This method of expressing a ratio used two numbers separated by a colon (:).

Tape Diagram

This uses rectangles to model the two quantities of a ratio. Also known as a strip diagram or bar model.