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math
what is a unit rate
two ratios that have the same value
rate of change
a rate that is simplified so that it has a denominator is one unit
equivalent ratios
a rate that describes how one quantity changes in relation to another. a rateof change is
usually expressed as a unit rate
rate
a ratio that compares two quantites with different kinds of units
proportion
an equation stating that two ratios with a constant rate or ratio
linear relatonship
a relationship for which the graph is a straight line
direct varation
the relationship between two varaible quantities that have a constant
cross product
the product of the numerator of one ratio and the denominator of the other ratio. the cross
products of any proportion are equal
constant of proportionalilty
a constant ratio or unit rate of two varible quantities. it is also called the constant of
variation
nonproportinal
the realtionship between ratios with a rate or ratio is not constant
derived unit
a unit that is from a measurement system base unit such as length mass or time
constat rate of change
the rate of change in a linear relationship