hi prof. huang,
it is possible to make the applet in the graphical mode where user can select a series of points and the applet display the equation of
1. linear regression fit
2. quadratic fit
3. area under graph.
the rationale of this request is after a needs analysis of students in the A level physics, the beginning students has difficulty understand and realizing from a experiential way.
learning difficulties addressed :
a = dv/dt
change in v = integral of a .dt from limits t initial to t final
change in s = integral of v .dt from limits t initial to t final
this way, computers can be used as a cognitive tool, to allow students to draw generalizations from computer generated equations.
attached is an example of how i intend to use these addon if available :) ;D
currently, the use of datalogger software from pasco ScienceWorkshop 2.3.3 allows users to do it