**TI83F* AppVariable file 12/24/08, 18:27@ / GLA208/ - nav 26CE319875DD4F1B9DFDCB650E5220B1GLA208.+GLA2081   asymptote <asymptote:A line that a graph approaches but never crosses. Change of Base Formula Change of Base Formula:For all positivenumbers a, b, and n, where a  1 and b  1,Log (base a) n = ((log (base b) n) / (log (base b) a)) common logarithm7common logarithm:A logarithm that uses 10 as the base. compound interest fcompound interest:Interest paid on the principal of an investment and any previously earned interest. decay factor Rdecay factor:In exponential decay, the base of the exponential expression, 1 - r. exponential decay^exponential decay:Exponential decay occurs when a quantity decreases exponentially over time. exponential equation Lexponential equation:An equation in which the variables occur as exponents. exponential function|exponential function:A function that can be described by an equation of the form y = ab^x, where a  0, b > 0, and b  1.  exponential growth`exponential growth:Exponential growth occurs when a quantity increases exponentially over time.  exponential inequality Fexponential inequality:An inequality involving exponential functions.  growth factor Tgrowth factor:In exponential growth, the base of the exponential expression, 1 + r.   logarithmlogarithm:In the function x = b^y, y is called the logarithm, base b, of x. Usually written as y = log(base b) x and read "y equals log base b of x."  logarithmic equationGlogarithmic equation:An equation that contains one or more logarithms. logarithmic functionlogarithmic function:The function y = log(base b) x, where b > 0 and b  1, which is the inverse of the exponential function y = bx. logarithmic inequality Klogarithmic inequality:An inequality that contains one or more logarithms. logistic growth model logistic growth model:A growth model that represents growth that has a limiting factor. Logistic models are the most accurate models for representing population growth. #natural base exponential function Qnatural base exponential function:An exponential function with base e, y = e^x . natural base, e Gnatural base, e:An irrational number approximately equal to 2.71828 . natural logarithm8natural logarithm:Logarithms with base e, written ln x. rate of continuous decay rate of continuous decay:The rate at which something decays continuously. Represented by a constant k in the exponential decay function f(x) = ae^-kt, where a is the initial value, and t is time in years. rate of continuous growth rate of continuous growth:The rate at which something grows continuously. The value of k in the exponential growth function,f(x) = ae^kt.