Sunday, November 8, 2015

HP Prime Geometry App Tutorial Part 5: Plotting Functions and Differential Equations

HP Prime Geometry App Tutorial Part 5:  Plotting Functions and Differential Equations

The Geometry App can plot functions, parametric functions, polar functions, sequences, implicit statements, slope-field and ordinary differential equations, lists, and designate sliders.   

In this lesson, we will demonstrate three types of plots.   For the purpose of the tutorial, clear the Plot screen before each example.

Plotting Functions ( y = f(x))

Plot y = e^x + 1.

1.  Press (Cmds), 6 for Plot, 1 for Function. 
2.  Type e^(x) + 1.  Press (OK).

Use the lowercase x.  The format is plotfunc( y(x) ).

Plot an Ordinary Differential Equation  (y’ = dy/dx = f(x,y))

Plot y’ = y*e^x +1 with the initial condition (1,1).

1.  Press (Cmds), 6 for Plot, 7 for ODE.
2.  Type y*e^(x)+1.   Note that x and y are in lowercase.
3.  Press [ , ] and type [x,y].   Here you designate which variable is independent and which is dependent.
4.  Press [ , ] and type  [1,1].  This is your initial conditions.  Press (OK), 

The entire format is plotode( f(x,y),  [x, y], [x0, y0])

Plot a Parametric Equation  ( x(t) + i*y(t) where i = √-1)

Plot x = 3t + 1, y = 2t – 1.   The format to be used is (3t + 1) + i*(2t -1).

‘1. Press (Cmds), 6 for Plot, 2 for Parametric.
‘2. Type (3t + 1) + i*(2t -1) and press ( OK ).

The entire format is plotparam( x(t) + i*y(t), var = tbeg..tend, tstep=step).  The t is in lowercase and the last two arguments, interval and step, are optional.

In Part 6 we’ll be plotting and working with polygons.   Thanks and take care,


This blog is property of Edward Shore.  2015. 


  1. Thank you for this blog post it actually couldn't have come at a better time for me !!

    123 hp setup

  2. Wonderful blog & good post.Its really helpful for me, awaiting for more new post. Keep Blogging!


Numworks Update 17.2 - Highlights

 Numworks Update 17.2 - Highlights Update is available at: The Numworks website will detect your calculator and wi...