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Line of best fit slideshare
1. DETERMINING A LINE
OF BEST FIT
(USING A GRAPHING CALCULATOR)
Goal: Determine an equation for a line of best fit
using a graphing calculator and define the squared
deviation for the determined equation.
2. WARM UP
There are 3 steps you need to take in order to plot points on a
calculator, what are they? (Feel free to use your graphing
calculator guide)
1. Turn Plot 1 On (2nd – Stat Plot)
2. Enter your data under L1 and L2 (STAT – Edit)
3. Adjust your window
4. Press Graph
13. Round each number to the nearest thousandth (three decimal
places) & substitute them into the equation “ax+b” to get an
equation for a
line of best fit.
14. y = 0.240x + -400.989
THIS IS YOUR EQUATION FOR THE LINE OF BEST
FIT!!!!!!