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Line of Best Fit The line of best fit is the line that lies as close as possible to all the data points. Linear regression is a method for finding the.

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Line of Best Fit On Graphing Calculator First press STAT and 1:EDIT. Enter the x- and y- coordinates in your calculator under L1 and L2. Then hit STAT, CALC, and arrow down to 4: LinReg (ax+b) and Press ENTER Should say xlist: L1 ylist: L2 Hit ENTER 5 times Arrow down and “a” is the slope of the line of best fit, “b” is the y-intercept
The line of best fit is the line that lies as close as possible to all the data points. Linear regression is a method for finding the equation of the regression line, Remember:
First press STAT and 1:EDIT. Enter the x- and y- coordinates in your calculator under L1 and L2. Then hit STAT, CALC, and arrow down to. 4: LinReg (ax+b) and Press ENTER. Should say xlist: L1. ylist: L2 Hit ENTER 5 times. Arrow down and a is the slope of the line of best fit, b is the y-intercept.
# of people Costs a = 16. b = 0. y = 16x.
x y a = 1.3. b = y = 1.3x If the trend continues, what would be the average score on the 8th unit exam (This is called extrapolation)
(0,5.1), (1,6.4), (2,7.7), (3,9), (4,10.3), (5,11.6), (6,12.9) a = 1.3. b = 5.1. If the trend continues, what would be the height of the tree after 9 years
Ex: The table below gives the number of people y who attended each of the first seven football games x of the season. Approximate the best-fitting line for the data. x y a = 27. b = If the trend continues, what would be number of people attending the 10th game
Remember slope can be positive or negative. Remember that b tells the y-intercept (where the line crosses the y-axis)
y = 1.5x y = 1.5x – 19. y = y = -1.5 – 19.
y = -16.7x y = -16.7x y = y = 16.7 –
y = 6.7x – y = 6.7x y = y = -6.7 –