Obviously I've forgotten things in the last 12 years because between my graphing calculator and wolfram alpha I can't figure out how to graph this correctly. Pretty sure its a summation but after a couple hours of looking at syntax online and wolfram alpha's documentation I haven't come up with the correct writing.
$x_n = x_{n-1} + x_{n-1} * 1.75$ where $ x_1 = 100 $, for n = 1 to n = 100
I know how to solve for any particular n in fact I have a line of code in my current program that does it for me (working on a role playing game (rpg))
exp_for_next_level += exp_for_next_level * exp_modifier_for_player_level
But I want to be able to graph it so I can play with various modifiers and starting experience and see where that puts me quickly for balancing purposes.