
The graphing calculator will only accept
entries that start with y = , so we need
to solve these equations for y =.
1. Enter the first equation into Y_{1}.
2. Enter the second equation into
Y_{2}.
3. Hit
GRAPH. The graphs appear to intersect OFF
the window. We need MORE xvalues
to the right hand side of the graph. Go to
WINDOW. Increase the size of
Xmax. Hit
GRAPH.4.
Use the
INTERSECT option to find
where the two graphs intersect (the answer).
2nd TRACE (CALC) #5 intersect
Move spider close to the
intersection.
Hit
ENTER 3 times.
5.
Answer:
x
= 12 and y = 1

Oops!! They don't cross
in the window.
Better! Xmax was
increased to 20. 