y = 2^(5-8x) solve for x
log y = log 2 * (5-8x)
log y / log 2 = 5-8x
5 - logy/log2 = 8x
5/8 - 1/8 logy/log2 = x now swithch the x and y's
5/8 - 1/8 log x / log 2 = f^-1(x)
5/8 - .41524 log x
y = 2^(5-8x) solve for x
log y = log 2 * (5-8x)
log y / log 2 = 5-8x
5 - logy/log2 = 8x
5/8 - 1/8 logy/log2 = x now swithch the x and y's
5/8 - 1/8 log x / log 2 = f^-1(x)
5/8 - .41524 log x