HP 48SX - Equationwriter Application and Plotting Example

EquationWriter Application and Plotting Example
Keystrokes
Description
(«a][EQUATION]
X2 +4X -2
(QJ[PLOT] HEM
P1
FTYFE FUNC
FLOTR [NXT) RESET
(«JPREV] AUTO
FCH ROOT @
()« ROOT
EXTR
(ATTN] (ATTN]
Selects EquationWriter application.
Enters expression x> + 4x — 2 onto the stack.
Selects Plot application and prompts for name for new expression.
Names expression P17; stores as current equation.
Selects FUNCTION plot type.
Selects PLOTR menu, resets plot parameters to default state, and erases PICT
(leaving blank PICT of default size).
Draws plot, autoscaling the y-axis.
Returns first root (.449489742783) and redisplays menu keys.
Moves cursor to far left and returns second root (—4.44948974278).
Redisplays menu and calculates extremum (-2, —6).
Exits application.