How to graph a cumulative subtraction on Wolfram Alpha I'd like to graph a timing algorithm that I'd been using (that did essentially the opposite of what I wanted). I apologize if I'm not using the correct name to refer to it.
Essentially it was timer = 100, timer = timer - level, where level increases from 0 to 50 etc.
For example; 100-1 = 99, 99-2 = 97, 97-3 = 94, 94-4 = 90, etc...
To give you some examples of the kind of graph I'd like, input the following two which were used to create the correct algorithm (a sort of exponential decay);
y=100\cdot e^{-0.05x} with x from 0 to 50
y=100*0.95^{x} with x from 0 to 50
(I'm writing a little article about the improved timer, and I'd like to include graphs of the old and new algorithms for comparison.) Thank you in advance. :)

FIRST I changed it to going from $500$
Secondly, it actually gives an alternate interpretation for the summation, and once THAT is punched in, guess what ;)
y=500-(0.5x(x+1)) from x=0 to x=31
Wolframalpha input
It's too bad that I couldn't get the $x\gt0$ plotting to work with sigma notation, but this works :)
y=100-( sum j, j=1 to x)
Wolframalpha input
