Step-by-step explanation: If you want to find these values in order from least to greatest, then you‘ll have to find each of their values in either decimal form or fraction form, but I recommend converting them to decimal form. 1/3 = 0.33333, 3/8 = 0.375, 0.625, 75% = 0.75. So, now you can arrange them in order, just remember to re-convert them to the form they were originally in.
The +k part of the function takes the original function and translates it straight up k units. It's as simple as that. If your function is the line f(x) = 3x, then the function f(x) = 3x + 4 moves that first function up 4 units.