Operation Manual

Chapter 3: Function Graphing 72
Chapter 3:
Function Graphing
Getting Started: Graphing a Circle
Getting Started is a fast-paced introduction. Read the chapter for details.
Graph a parabola in the standard viewing window. Then translate this parabola to see a family of
curves. Use ZDecimal to adjust the display to trace by 0.1.
1. In
Func mode, press o to display the Y= editor. Press
Ë
2 „ ¡ Í to enter the function Y=.2X
2
,
which defines a parabola.
You can define one function in terms of another. To
define Y2=Y1+1, press t a to display the
Y-VA R S shortcut menu, and then press Í to
select Y1. Press Ã1 and press Í.
Repeat these steps to enter Y3=Y1+2. To define
Y3=Y1+2, press t
a to display the Y- VA R S
shortcut menu, and then press Í to select
Y1.
Press Ã2 and press Í.
2. Press q
6 to select 6:ZStandard. This is a quick
way to reset the window variables to the default
values. It also graphs the functions; you do not need
to press s.
3. Since the graph of the parabola does not have an
asymptote, you can increase the speed of the graph
by turning asymptote detection off. To turn off
asymptote detection, press y .} ~ Í.