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 TOPICS This page:   equations, graphs   translations    Search   Dr. Math See also the Internet Library:   graphing equations HIGH SCHOOL About Math Analysis Algebra    basic algebra    equations/graphs/      translations    linear algebra    linear equations    polynomials Calculus Complex Numbers Calculators/    Computers Definitions Discrete Math    permutations/    combinations Exponents    Logarithms Fibonacci Sequence/   Golden Ratio Fractals Functions Geometry    Euclidean/plane      conic sections/        circles      constructions      coordinate plane      triangles/polygons    higher-dimensional      polyhedra    non-Euclidean    practical geometry    symmetry/tessellations History/Biography Interest Logic Negative Numbers Number Theory Physics/Chemistry Probability Projects Puzzles Sequences/Series Sets Square/Cube Roots Statistics Transcendental   Numbers Trigonometry Browse High School Equations, Graphs, Translations Stars indicate particularly interesting answers or good places to begin browsing. Selected answers to common questions:     Asymptotes.     Direct and indirect variation.     Slope, slope-intercept, standard form. Two Slopes, and Two Ways to Average Them [01/06/2016] An adult has questions about the validity of a colleague's simple method to average slopes — and about simplifying his own, more involved approach. With sketches, trigonometric identities, and conjugate products, Doctor Peterson explains the methods, and shows their equivalence. Types of Linear Systems [10/13/1997] What is meant when a type of linear system is said to be a consistent or an inconsistent system? Understanding Parametric Equations [04/02/1998] Can you explain the basic principles of parametric equations? Units for Inverse Quantity [9/10/1996] I have a graph of time vs. 1/distance. What units do I use for 1/ distance - cm^-1? Uses for Parametric Equations [04/23/1998] What is a parametric equation used for? Can you give me an example? Using Cardan's Formula to find Real Roots [04/13/2000] How can I show that, although the cubic equation x^3 - 6x = 4 has three real solutions, Cardan's formula can find them by subtracting appropriate cube roots of complex numbers? Using Descartes' Method of Tangents [10/2/1995] Given a point P(3,9) on a parabola y=x^2, how do I find the slope of the tangent to the parabola at point P using Descartes' method of tangents? Using Graphs to Solve Problems [12/29/1996] How do you use graphs to find the answers to questions? Using x-Intercepts to Sketch Parabolas [08/04/2002] How does knowing the x-intercepts of a parabola help me sketch it? Variation Per Unit of Time [02/22/2002] Why does the slope of a line correspond to the space that the particle runs per unit of time? A Way to Remember What 'm' and 'b' Mean in Slope-Intercept Form [02/01/2004] An interesting memory trick to help you remember how to graph a linear equation in slope-intercept form. What We're Doing When We Do Algebra [03/25/2002] How do you graph x + y = 5 on a graph sheet? Write in Slope-Intercept Form [11/06/1997] Write and sketch x - y + 2 = 0 . X- and Y-Intercepts [09/15/1998] I'm having a hard time finding out how to solve an equation and then do the graph. The intercepts confuse me also... X Line in a 3D Graph [03/10/2001] Which is the x line - vertical or horizontal? X = TanX [03/21/2001] Show that x = tanx has an infinite number of solutions. Page: [

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