VOCAB
Constant of proportionality
The constant of proportionality is the ratio between two directly proportional quantities.
Rate of change
ROC is often used when speaking about momentum, and it can generally be expressed as a ratio between achange in one variable relative to a correspondingchange in another; graphically, the rate of change is represented by the slope of a line.
Proportion
A proportion is a name we give to a statement that two ratios are equal.
Percent error
Sales tax
a tax on sales or on the receipts from sales.
Equivalent ratios
are two ratios that express the same relationship between numbers
Cross products
the product of two real vectors in three dimensions which is itself a vector at right angles to both the original vectors.
Unit rate
When rates are expressed as a quantity of 1, such as 2 feet per second or 5 miles per hour, they are called unit rates.
Principal
The total amount of money borrowed (or invested), not including any interest or dividends.
Markdown
a reduction in price, usually to encourage buying. the amount by which a price is reduced.
Rate
In mathematics, a rate is the ratio between two related quantities
Non-proportional
Mathematics . (of two quantities) having the same or a constant ratio or relation
Direct variation
A relationship between two variables in which one is a constant multiple of the other.
Gratuity
The definition of gratuity is a sum of money given to someone who provides service or a favor as a way to show graciousness or thankfulness.
Percent of decrease
Percent increase and percent decrease are measures of percent change, which is the extent to which a variable gains or loses intensity, magnitude, extent, or value. The figures are arrived at by comparing the initial (or before) and final (or after) quantities according to a specific formula.
Constant rate of change
The (constant) rate of change with respect to the variable x of a linear function y = f(x) is the slope of its graph
Slope
The steepness, incline, or grade of a line is measured by the absolute value of the slope.
Proportional
corresponding in size or amount to something else.
Percent of change
Percent increase and percent decrease are measures of percent change, which is the extent to which a variable gains or loses intensity, magnitude, extent, or value. The figures are arrived at by comparing the initial (or before) and final (or after) quantities according to a specific formula.
Markup
an amount added to the cost price to determine the selling price broadly
Linear relationship
A relationship of direct proportionality that, when plotted on a graph, traces a straight line.
Derived unit
unit of measurement obtained by multiplication or division of the base unitsof a system without the introduction of numerical factors.
Discount
a deduction from the usual cost of something, typically given for prompt or advance payment or to a special category of buyers.
Selling price
Selling price is the price at which a product or service is sold to the buyer. However, cost price is the price that is incurred to produce a product or provide a service to the buyer. Formula to calculate selling price.
simple intrest
Simple interest is a handy, easy tool for estimating theinterest earned or paid on a certain balance in one period. ... This means it can dramatically understate the amount of interest earned or paid over time.