Aim of the Applet
To construct a straight line and parables near a cloud of points.
Input data
The points for the calculation of the adjustment can be introduced by the user directly on the graph once touched the button by a blue circle and A or by keyboard.
"Calculate" button.
"Restart applet" button.
"Evaluate" button.
Margin to control the visualization of the axes from the points of the ends.
Output data
The resultant straight line and the parables and his expression.
Pearson's Correlation Coefficient.
The evaluations of the adjustments in the wished point.
Observations
Once made the calculations they can drag the points puncturing on them after selecting the tool of displacement (icon of the pointer of mouse).
The first steps
- It draws a cloud of points and calculates the linear and quadratic adjustment. You must select on the icon of the arrow and modifies the positions of the points to observe how they change the adjustments. It analyzes which of the points has more weight in the modifications.
- It draws 4 aligned points and calculates the polynomials of regression.
for adding points in the graphic view.
