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304 The Explorer apps
Test mode Tap to enter test mode. In test mode you test your
skill at matching an equation to the graph shown. Test
mode is like equation mode in that you use the cursor keys
to select and change the value of one or more parameters
in the equation. The goal is to try to match the graph that
is shown.
The app displays the
graph of a randomly
chosen sinusoidal
function. Tap a Level
button— ,
and so on—to choose
between one of five types
of sinusoidal equations.
Now press the cursor keys to select each parameter and
set its value. When you are ready, tap to see if you
have correctly matched your equation to the given graph.
Tap to see the correct answer and tap to
exit Test mode.