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The document provides a step-by-step guide on how to use the TI-86 calculator to create a scatter diagram, input data, calculate the line of best fit using linear regression, and graph the results. It includes instructions for entering data, setting up the viewing window, and interpreting the output, including the equation of the line of best fit and its correlation value.
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Graphing a function on the TI-86: Press the ON button, located at the bottom left corner of the calculator. Press the GRAPH button which is on the leftside, third button down. Press the F1 button, located at the top left corner of the calculator. Type in a function, like x2 , in the spot where it says \y1=.
Calculate the statistics: Press [F5] for Calc. Select 1:OneVar. Scroll to the X field and input c1. Scroll to Use freq and Categories? and select. 2:YES. Now, scroll to the Freq field and input c2. Finally, press [ENTER] [ENTER] and the one-variable statistics with frequencies will be displayed.
The line of best fit formula is y = mx + b. Finding the line of best fit formula can be done using the point slope method. Take two points, usually the beginning point and the last point given, and find the slope and y intercept.
The line of best fit estimates a straight line that minimizes the distance between itself and where observations fall in some data set. The line of best fit is used to show a trend or correlation between the dependent variable and independent variable(s). It can be depicted visually, or as a mathematical expression.
To find the line of best fit: Apps. 6: Data/Matrix Editor. 1: Current. F5 Calc. Calculation Type: Arrow Right then 5: LinReg (that stands for linear regression) x: c1. y: c2. Store RegEq to . . : Arrow right then select y1(x) (or any other function number)

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Regression on the TI-89 x enter c1 y enter c2 Store RegEQ to this allows you to store the equation so that it may be graphed. For example, you can select y1(x) and this will store the answer in the graph area as equation y1(x). Use Freq and Categories Select No. 5) Press enter to get the equation.

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Finding the Line of Best Fit Using the TI-86

Aug 26, 2002 The calculator gives the linear equation in a + bx form. So the equation of the line of best fit is: y1 = -3.86190 + 1.12857x which we are more

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