A relationship between two variables in which one is a constant multiple of the other.
A ratio between two sets of measurements; in scale drawings-the ratio of the measurement on the drawing compared to the measurement of the original subject.
Constant Rate of Change
When the variables are multiplied by the same number; a rate that does not change.
A quantity that can change or vary, taking on different values; a letter or symbol representing a varying quantity.
A comparison of two or more quantities; may be written as 3:4 or as a fraction.
An equation stating that two ratios are equivalent.
A ratio that compares quantities of two different types or a relationship between two units of measurement.
A ratio that compares quantities of two different types and the quantity of the second number is "1"; a rate that has a denominator of "1" unit.
Constant of Proportionality
The constant value of the ratio of two proportional quantities "x" and "y"; usually written y=kx, where "k" is the factor of proportionality.
Having the same amount or value; similar, commensurate, equal to.