My nephew gets confused in drawing exponential curves with many variations:
If , then reverse the y values, that is flip the curve over x-axis.
“For unto every one that hath shall be given, and he shall have abundance: but from him that hath not shall be taken even that which he hath.”
—Matthew 25:29, King James Version
Or, “the rich gets richer, the poor gets poorer.”
Mathematically, this is