User Manual

© 2006 TEXAS INSTRUMENTS INCORPORATED TI-30XS MultiView: A Guide For Teachers 15
Ask the students the following:
"If you calculate W weeks times $4, you get a
number. What does that number mean to Kyle?" You
are prompting the student to say Money (M) and lead
them into writing the formula or sentence in two
variables, M = W x 4. Typically, you write the number
and then the letter with implied multiplication.
Remind students that multiplication is commutative
so M = W x 4 = 4 x W = 4W.
Support the investigation using the data editor
( v) on the TI-30XS MultiView™ calculator by
having the students look at many values of their
algebraic expression to see if they match the table
they created.
1. Have students enter their table into the data list.
Notice there are three lists available: L1, L2, and
L3.
Discuss that they will enter the Week (W) values
in L1.
2. Have the students enter the first three values of
W from their table, {1, 2, 3}.
3. Enter a formula to validate the work: L2 = 4 x L1.
Notice that W = L1 and M = L2.
4. Add input to L1 to see L2 update automatically
with the output value of the formula. Scroll to an
open entry space in L1. Ask them to check their
table for 4 weeks and then 100 weeks.
Before starting the group investigation on the
student sheet, have the students clear the data in the
lists.
(Continued)
³ Make sure all students have their
calculator mode set as shown:
To return to the Home screen, press
-.
1. Enter the first three values of W:
v 1 $ 2 $ 3 $.
2. Enter the formula:
" v " 1
4 V v 1 <.
3. Add input to L1:
! $ $ $
4 <
100 <.
4. To view the formula in L2 again,
press
" v " 1.
5. Edit the formula, if desired, and
press < to set the formula again.
6. To clear data, press
v 4.
At the movies (Continued)
³ Hint: Remember that pressing %Q
takes you back to the Home screen.
³ Remind students that for this
activity they are using the
features in vand not o.
³ If students are not familiar with the
TI-30XS MultiView calculator, have
them turn on the calculator and press
p.