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inverse variation
x and y show inverse variation y = ^{k}/_{x}

constant of variation
the constant is the k in the following equation y = ^{k}/_{x} (always non zero)

joint variation
occurs when a quantity varies directly as the product of 2 or more other quantities

rational function
function in the form (x) = ^{y(x)}/_{z(x)}

hyperbola
the graph of a rational function

branches
the two symmetrical parts of the hyperbola

simplified form
the numerator and denominator have no common factors

complex fraction
a fraction that contains a fraction in the numerator or denominator

cross multiplying
solves simple equations by multiplying across diagnolly

