Texas Instruments TI-83 Manual Book page 572

3. Press q ~
Set
XFact=10
4. Press q
free-moving cursor onto the apparent intersection of the functions on
the right side of the display. As you move the cursor, notice that the
and values have one decimal place.
Y
5. Press Í to zoom in. Move the cursor over the intersection. As
you move the cursor, notice that now the
decimal places.
6. Press Í to zoom in again. Move the free-moving cursor onto a
point exactly on the intersection. Notice the number of decimal
places.
7. Press y /
curve and Í to select the second curve. To guess, move the
trace cursor near the intersection. Press Í. What are the
coordinates of the intersection point?
8. Press q
9. Press q. Select
the apparent function intersection on the left side of the display.
TI-83 Plus Activities
to select
4 4:SetFactors
and .
YFact=10
to select
2 2:Zoom In
to select
5 5:intersect
to select
4 4:ZDecimal
2:Zoom In
from the
. Use |, ~, }, and † to move the
and
X
. Press Í to select the first
to redisplay the original graph.
and repeat steps 4 through 8 to explore
menu.
ZOOM MEMORY
values have two
Y
X
569