Scatter Diagrams : TI-86

A.     Clear Previous Data                                               

  1. Press 2nd [+] …                             
  2. F2 [EDIT]
  3. Up arrow to highlight xStat
  4. CLEAR, ENTER
  5. Up arrow to highlight yStat
  6. CLEAR, ENTER

 

B.     Enter Data

 

Enter the x values in the 1st column, the y values in the second

 

C.     Draw a Scatter Diagram of the data:

  1. EXIT
  2. Press 2nd [+] …  
  3. F3 PLOT
  4. F1 PLOT1
  5. ENTER
  6. EXIT, EXIT                
  7. GRAPH
  8. F3 ZOOM      
  9. MORE
  10. F5 ZDATA
  11. EXIT

 

D.     When finished, turn STAT PLOT OFF

  1. Press y [+] [STAT]  
  2. F3 PLOT
  3. F5: PlOff

Press Í

 

E.      Calculate the Regression equation

  1. Press 2nd [+] …  
  2. F1 [CALC]; F3 [LinR]
  3. 2nd CUSTOM; MORE, MORE, F4 [STAT]
  4. arrow down to xStat and ENTER
  5. type a comma (,)
  6. repeat 2nd CUSTOM; MORE, MORE, F4 [STAT]
  7. arrow down to yStat and ENTER
  8. ENTER
  9. The model is y = a + bx    or   bx + a