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

Lessons 28

Consider the following data:

X 0.2 0.4 0.6 0.8 1.1 1.3 1.4 1.7 1.9 2.2 2.3 2.6 2.7 3.0 3.2
Y 2.6 2.3 2.1 2.0 2.1 2.1 2.2 2.5 2.8 3.3 3.8 4.4 5.1 5.9 6.8

Use the CASIO FX7400G to draw a quadratic 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 (X^2)

The following appears on the calculator screen:

QuadReg
   a = 0.96835
   b = -1.88991
   c = 2.91968
   y = a x2 + b x + c

Press

Press

Turn off the CASIO FX7400G. Press (OFF)