FOR ISA CONDITIONS BELOW THE TROPOPAUSE
Draw a horizontal line to represent values of seed, increasing from left to right. Now draw a vertical line starting at the left end of the speed line. This second line represents altitude, high at the top and low at the bottom. Now draw four straight lines fanning out from a single point as they move up from the horizontal speed line.
Starting from the left, label these lines E (for EAS), C (for CAS or R for RAS if you prefer), T (for TAS) and M for Mach number). These lines show how the relative values of these speeds vary with altitude. As you climb they move apart and as you descend they converge. A line sloping up to the right means an increasing value and a line sloping up to the left means a decreasing value.
Now to model for example a constant CAS climb redraw the lines, but this time with the CAS line vertical. You should still have them in the order E, C, T, M, but the C is vertical. Moving up the page shows that at constant CAS the EAS decreases (line moving left) and the TAS and Mach both increase (lines moving right). For a constant CAS descent just move down the lines. This will show EAS increasing and TAS and Mach decreasing.
For constant EAS, TAS or Mach simply redraw the lines, with the line representing whatever is canstant vertical. Provided you do not alter the order of the lines they will show how the speeds vary with changes in altitude.
FOR AN ISOTHERMAL (INCLUDING THE STRATOSPHERE)
Draw similar lines but this time use only three, with the one at the right representing both TAS and Mach. This is required because constant temperature means a constant TAS to Mach ratio.
FOR AN INVERSION
Simply redraw the original four lines, but reverse the order of the TAS and Mach lines. You should now have them in the order E, C M, T from left to right.
For all of these methods simply draw the line representing your constant speed vertical, and the others will show how the other speed vary with changing altitude.
PUGZI
Does your Chicken tikka masal method involve four fingers stretched over the mouth while chucking up the curry???