The Explorer Apps
149
It is also possible to have the
equation control the graph.
Press
to enter
Equation mode.
Press
>
and
<
to move
between parameters and
press
=
and
\
to change the value of a parameter. The
graph of the equation will update in real time as you
change the values of the parameters. Press
to
cycle through the various forms of quadratic functions
available.
A
menu key is
provided to evaluate the
student’s knowledge. Press
to display a target
quadratic graph. The student
must manipulate the equation’s parameters to make the
equation match the target graph. When a student feels
that they have correctly chosen the parameters a
menu key evaluates the answer and provide feedback.
An
menu key is provided for those who give up!
Trig Explorer app
The
Trig Explorer app is used to investigate the behaviour
of the graph of
as the values of
a
,
b
,
c
and
d
change, both by manipulating the equation
and seeing the change in the graph,
or by manipulating
the graph and seeing the change in the equation.
Press , select
Trig
Explorer
, and then press
to display the screen
shown right.
The app opens in Graph
mode. Note that the first
menu key (F1) is labeled
GRAPH
. In this mode, you
can manipulate the graph
and the changes are
reflected in the equation. Press
=
,
\
,
<
and
>
to
transform the graph, with the transformations reflected in
the equation.
y
a
bx
c
+
(
)
d
+
sin
=
Summary of Contents for 39gII
Page 1: ...HP 39gII graphing calculator user s guide Edition1 Part Number NW249 90001 ...
Page 2: ...Printing History Edition 1 November 201 1 ...
Page 32: ...22 Getting started ...
Page 58: ...48 Apps and their views ...
Page 70: ...60 Function app ...
Page 80: ...70 Solve app ...
Page 136: ...126 Polar app ...
Page 140: ...130 Sequence app ...
Page 148: ...138 Finance app ...
Page 152: ...142 Linear Solver app ...
Page 218: ...208 Matrices ...
Page 226: ...216 Notes and Info ...
Page 238: ...228 Variables and memory management ...
Page 318: ...308 Programming ...
Page 340: ...330 Reference information ...
Page 346: ...vi Product Regulatory Information ...