Percent
When a value goes up by a percent
Percent Increase
The point (0,0) on a coordinate plane
origin
A part of a whole expressed as a number out of 100
Percent
The horizontal axis on a coordinate plane where values are plotted left to right
X- Axis
When a value goes down by a percent
Percent decrease
The fixed value in a proportional relationship
constant
Money added to bill for service
Tip
The vertical axis on a coordinate plane where values are plotted bottom to top
Y-Axis
The amount taken off the original price
Discount
A relationship where two variables have a constant ratio
Proportional Relationship
The difference between an estimate and actual value as a percent
Percent Error
An equation showing that two ratios are equal
Proportion
A tax added to the price of goods
Sales tax
A rate with a denominator of 1
Unit Rate
Earnings based on a percentage of sales
Commission
A comparison of two quantities using division; the quotient of two numbers
Ratio