Linear Regression on TI-81

  • Helps for using the TI81 for Linear Regression

     

    Entering data into List 1 (x) and List 2 (y)

    STAT (2nd MATRIX)/DATA/EDIT

    (you will enter x then y for each data point)

     

    Finding the Linear Regression Line

    STAT (2nd MATRIX)/CALC/LinReg

    (the equation is bx+a; b is the slope; a is the y-intercept)

     

    Graphing the scatterplot

    RANGE (set the window with min/max for x and y)

    STAT (2nd MATRIX)/DRAW/Scatter