Mathematical plotting software for curves and statistical functions.
Including cubic spline interpolation.

Seems to have been used along with David Tall's "A Graphics Approach
To Calculus"

> I don?t know when it first came out, but that, it would have been in
> the early 80?s. And that?s basically that, so that?s where and then
> I wrote a graphics approach, now what is it, Investigating Change,
> which is an introduction to Calculus for Australian Schools. That
> was starting in about 1988 that we started planning for it. The
> first half was published in 1991 and the second half in 1993 and I
> don?t think it has dated. We made a conscious decision at that stage
> when we were writing that to include computer and graphics
> calculator use without being specific about which because we didn?t
> know quite which way the technology was going to go. And so I used
> ANU graph to produce all the graphs that appeared in the books but
> it was written so that, with the intention that people could use
> graphics calculators or a graphics utility on a computer to do the
> investigations and again it was written with the idea that you do
> exploratory investigations.

? ["The History of Computer Use In Senior School Mathematics Teaching
in the Government School System of New South Wales: 1971?1992.", 2013
September, p.315 thesis of Peter L. Sollorz, ][1]

ANU Graph 2.0 was released in the January prior to the publishing of
School of Mathematical Sciences - Annual Report 1990 - The Australian
National University

> While at the ANU Martin, often with Neville Smyth, has been involved
> with many innovative teaching programs. I recall that they worked to
> introduce the Keller plan back in the 70s, to enable students to
> undergo self-paced learning. I do not think that this still operates
> because it has depended heavily on tutor manpower, but it was quite
> revolutionary at the time.
>
> Martin is probably best known nationally, and in fact
> internationally, for his work as co-developer with Neville of ANU
> GRAPH, one of the best graphical teaching programs on the market.
> Whereas this has been developed over many years it is still being
> actively maintained, with a new version for imminent release.

? [Australian Maths Trust - 1999 BH Neumann Award Recipients][2]

Compatibility
Architecture: 68k

  [1]: https://espace.curtin.edu.au/bitstream/handle/20.500.11937/2016/194451_Sollorz%202014%20Correct%20Revised.pdf?sequence=2
  [2]: https://www.amt.edu.au/1999-bh-neumann-award-recipients