I should have used a different letter for acceleration above, so as not to confuse it with the constant a.
Acceleration better as, say: acc = 2a - 6bt.
.
Displacement: x = at^2 - bt^3
Velocity: v = 2at - 3bt^2 Velocity is rate of change of displacement with time
Acceleration: a = 2a - 6bt Acceleration is rate of change of velocity with time.
x/y = 2/3 y/z = 5/7 Multiply the two together to get x/z = 10/21
Can express y/z as 15/21
So: x:y:z = 10:15:21
Like so:
You could try the online Desmos graphing calculator.
You have two = signs!!
What do you want to plot against what (h vs E?)?
Melody,
These are quite well known summations, though I can't think, offhand, exactly how to do them!
pmcc = Pearson product moment correlation coefficient.
See: https://en.wikipedia.org/wiki/Pearson_product-moment_correlation_coefficient for example
This can be expressed as follows:
As Melody noted, it is not an Arithmetic Progression, which has a constant difference between successive terms.
+33667 
