The rate of change is 5/-4
" of " means multiply
1/4 * 3.20/1...and just multiply....(1 * 3.20) / (4 * 1) = 3.20/4 = 0.8
or
1/4 = 0.25.....0.25(3.20) = 0.8
A,H,I,M,O,T,U,V,W,X,Y --- these have vertical symmetry
a word whose reflection is also a word....YAM and MAY