A. Polynomial Functions
    B. Trigonometric Functions
    C. Rational Functions
    D. Exponential Functions
    E. Radical Functions
    F. Logarithmic Functions


    A. Overview
        1. WINDOW
        2. ZOOM Menu
        3. TRACE
        4. TABLE
     B. Examples
        1. Polynomial Function
        2.Trigonometric Function
        3. Radical Function
        4. Rational Function
        5. Exponential Function
        6. Logarithmic Function


    A. TRACE
       B. TABLE
       C. CALC
       D. Style
       E. FORMAT
       F. ZOOM


      A. Piecewise Defined Function
      B. Greatest Integer Function
      C. Inverse Trigonometric Function
      D. Graphing a Derivative
      E. Graphing an Integral


      A. Tangent
      B. Draw Inverse
      C. Circle

        A. MODE
        B. LINK
        C. LIST
        D. STAT
        E. MATH & NUM
        F. TEST
        G. ANGLE
        H. VARS & Y-VARS
        I. MATRX (matrix)
        J. MEM (memory)
        K. CATALOG

      A. Cursors
      B. 2nd Key
      C. ALPHA
      D. INS (insert) and DEL (delete)
      E. Variable Key
      F. Exponential & Logarithmic Keys
      G. Trigonometric Keys
      H. Notation Keys
      I. Storing a Value in a Variable