TSM Resources

ATM: MT-274
"Autograph - a new resource for all seasons"

An all-device web version is due in the New Year. Meanwhile Autograph 5 will run all these files,
and it can be downloaded for free on www.completemaths.com, running on all Windows computers and pre-Catalina IOS

Any device will run all these videos.


MT articles


1. A new feature of Autograph is the ability to define a new ‘XY’ point using attributes of other objects.

Here its coordinates are: the enlargement factor, ‘k’ and the enlarged area.

As ‘k’ is animated the values can be recorded and plotted to confirm a quadratic relationship (the host shape has area 6).


Autograph files:

Enlargement
Recording


2. Single variable: points can be dropped in and moved about to help understand the box plot and its outliers.

Autograph file:

raw-data




3. Velocity-Time graph entered as a piece-wise function. The distance travelled is generated from the area to time ‘t’

Autograph file:

velocity-time


4. Just 6 points added which can be moved about to help understand the mean, best fit line and correlation.

Autograph file;

scatter diagram


5. The very visible link between the sine graph and the unit circle, together with a locus of a chord of length 1
.

Autograph files:

unit circle
circle locus

 


6. Exploring an inequality: using the calculator to evaluate 2x–3y for a moveable point: more than 6 on the right!

Autograph file:

inequality


7. A cone and a plane illustrating the conic sections, together with the construction of a parabola.

Autograph files:

conics-3D
conics-eqns
conics-polar
parabola


8. I have always wanted a 3D Argand Diagram and here it is!
Three views of the roots of
x² – 2x  + c = 0

when ‘c’ = 2:

(a) in the x-y plane ‘no solutions!’,
(b) in the 2D Argand diagram with ‘z’ entered as
1 ± √(1 – c)


In (c) in 3D with the ‘z’-axis being imaginary.

Naturally this all comes to life as you vary ‘c’ dynamically.

Autograph files:

quadratic
argand
3D-argand

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Contact: Douglas Butler
November 2020