Graphing Quadratic Regression, Graphing Quadratics Unit,
Unit 9, Algebra 1, 2015-16
1. 2nd
2. CATALOG (the 0 button)
3. Scroll down to DiagnosticOn
4. ENTER
5. 2nd
6. STAT PLOT,
7. ENTER
8. Turn plot 1 ON
9. ENTER
10. CLEAR
11. 2nd
12. STAT PLOT (Just to be double-check that Plot 1 is ON)
13. STAT
14. 1: Edit
15. Enter x values in L1
16.
Enter y values in L2
17. STAT
18. CALC
19. 5: QuadReg: quadratic regression – finds a quadratic of best fit (y = ax2+bx+c)
20. VARS
21. Y-VARS
22. 1:Function
23. 1:Y1
24. ENTER
25.
Y = ax2 + bx + c  Equation for quadratic of best fit. Equation: _____________________________
26.
R2 is __________________ The closer to “1” the better the line.
27.
ZOOM
28.
9:ZoomStat
The points from L1 and L2 and its parabola will appear.