**TI83F* AppVariable file 12/24/08, 18:27 GLA109nav 868E89BEB1644A6EA4327E33887122BEGLA109. GLA1091  axis of symmetryHaxis of symmetry:The vertical line containing the vertex of a parabola.  common ratioDcommon ratio:The ratio of successive terms of a geometric sequence. completing the squarecompleting the square:To add a constant term to a binomial of the form x^2 + bx so that the resulting trinomial is a perfect square. compound interest?compound interest:A special application of exponential growth. dilationNdilation:A transformation that alters the size of a figure but not its shape.  discriminantYdiscriminant:In the Quadratic Formula, the expression under the radical sign, b^2 - 4ac.  double rootCdouble root:The roots of a quadratic function are the same number. exponential decay^exponential decay:Exponential decay occurs when a quantity decreases exponentially over time.  exponential functionqexponential function:A function that can be described by an equation of the form y = a^x, where a > 0 and a  1.  exponential growth`exponential growth:Exponential growth occurs when a quantity increases exponentially over time.  geometric sequencegeometric sequence:A sequence in which each term after the first is found by multiplying the previous term by a constant r, called the common ratio. Example: 1, 4, 16, 64, 256. . .   maximummaximum:The highest point or the critical point on the graph of a curve where the curve changes from an increasing curve to a decreasing curve.  minimum2minimum:The lowest point on the graph of a curve. nonlinear function[nonlinear function:A function with a variable term that has an exponent other than 1 or 0. parabolaT!,parabola:The graph of a quadratic function. quadratic equationOquadratic equation:An equation of the form ax^2 + bx + c = 0, where a  0. Quadratic FormulaQuadratic Formula:The solutions of a quadratic equation in the form ax^2 + bx + c = 0, where a  0, are given by the formula x = (-b +/- (b^2 - 4ac)) / (2a). quadratic functionfquadratic function:A function described by an equation of the form f(x) = ax^2 + bx + c, where a  0.  reflection I !Vreflection:A transformation where a figure, line, or curve, is flipped across a line.  standard formstandard form:The standard form of a linear equation is Ax + By = C, where A  0, A and B are not both zero, and A, B, and C are integers with a greatest common factor of 1. symmetrysymmetry:A geometric property of a figure in which it can be folded so that each half matches the other exactly or rotated about a point less than 360 so that the final image matches the original figure. transformation1transformation:A movement of a geometric figure.  translation !gtranslation:A transformation where a figure is slid from one position to another without being turned. vertex3vertex:The maximum or minimum point of a parabola.8`$B<;@     @ @      0  0 @  ǀ x@@| <9H9`@@!aaF @@0@@@@ @@  @   !@Da@ `@0p8`! #p!  @@@@@@@@      % % % @@@@@@