Linear Regression (4-6)
Linear Regression (4-6)
Linear Regression
• A precise best-fit line found by computers
Correlation coefficient (r)
• Tells you if your correlation is positive or negative
• The closer the correlation coefficient is to 1 or -1, the more closely the equation models the data.
TI-83 or TI-84
• Enter the data:
o [pic]
o Edit
o x-values ( L1
o y-values ( L2
• Calculate Linear Regression (equation of best fit line) and Correlation Coefficient
o [pic]
o CALC
o LinReg (ax+b)
o [pic] [pic]
[pic]
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