🚀 go-pugleaf

I have two questions for information:

(1)  According to the definition of Zoom Standard for Ti85, what are the
values for the "change of x" and "change of y" as it does it 
computation and plotting? I could not find the exact answer to this
question in the "Guide Book."

The "Guide Book" for the Ti85 defines ZTRIG and ZDECM values
quite well, but not for ZSTD. 

(2) Could someone give a good reason for using the ZINT?

I am having trouble understanding the wording in the Guide Book for
ZINT, "... change of x=1, change of y=1, the mid-point of each point
is an integer, xScl=10 and yScl=10." -- page  4-22.  What does the
midpoint of each point mean?? 

Thanks,

-- Dan Frezza