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Lessons / Activities : Lessons for Calculators : Casio TEAMS Grant Algebra Lessons

Lessons 30

Consider the following data:

X 50000 100000 200000 250000 350000 450000 500000 550000 600000
Y 3.8258 4.2923 4.8491 5.0426 5.3439 5.5751 5.6733 5.7527 5.8448

Use the CASIO FX7400G to draw a logarithmic regression for these data.

Turn on the CASIO FX7400G.

Use your cursor arrows to highlight the STAT menu and press or just press when at the main menu screen.

Use your cursor arrows to move to the first cell in List1 and enter the data given above. After entering a value make sure to press to go down to the next cell.

Use your cursor arrows to move to the first cell in List2 and enter the data given above. After entering a value make sure to press to go down to the next cell.

Press (CALC)

Press (SET )

Scroll down and set the parameters as follows:

StatGraph1

2Var X:  List1  Press  if necessary.
2Var Y:  List2  Press  if necessary.
Freq  :  1      Press  if necessary.

Press  
Press (CALC)
Press (REG)
Press (More key)
Press (X^2)

The following appears on the calculator screen:

LogReg
   a = -5.14742
   b =  0.82322
   r =  0.99836
   y =  a + b ln x

Press

Press

Turn off the CASIO FX7400G. Press (OFF)