Operation Manual

Chapter 12: Statistics 212
Modify parameter values
Press the cursor navigation keys (|~) to move from the first parameter (m) or (b) the second
parameter. You can press Í and type a new parameter value. Press Í to display the new
parameter value. When you edit the value of the selected parameter, the edit can include insert, delete,
type over, or a mathematical expression.
The screen dynamically displays the revised parameter value. Press Í to complete the modification
of the selected parameter, save the value, and refresh the displayed graph. The system displays the
revised parameter value in the symbolic expression Y=mX+B, and refreshes the graph with the updated
Manual-Fit Line.
Select y 5 or press t [F5] (DONE) to finish the Manual Fit function. The calculator stores the
current mX+b expression into Y3 and makes that function active for graphing. You can also select
Manual-Fit while on the
Home screen. You can then enter a different Y-Va r such as Y4 and then press
Í. This takes you to the Graph screen and then pastes the Manual-Fit equation in the specified Y-
Var
.
QuickPlot
QuickPlot & Fit-EQ allows you to drop points on a graph screen and model a curve to those points using
regression functions. You can select color and line style, draw points on a graph, and choose an
equation to fit the drawn points. You can then store the results of the plot and equation.
QuickPlot & Fit-EQ is an option in the … / menu.
After entering window and format settings, select the QuickPlot & Fit-EQ command.
1. Press
… ~ } to
highlight
QuickPlot&Fit-EQ
from the
CALC menu.
2. Press Í.