Function in geogebra. Need help!?

If the thing (whatever it is) is increasing at 25% per year then you have a growth factor of 1.25 (i.e. after 1 year the size is 125% of what it was, and 125% = 125/100 = 1.25) so after 2 years it will be 100,000*1.25^2, after 3 years 100,000*1.25^3 etc so you have an exponential function, N = 100,000*1.25^t where t is the number of years and N is the value after years. To graph that, take the horizontal axis as t, marked out as 1, 2, 3, ... and the vertical axis as N, marked out in multiples of 100,000. At t = 0, 1.25^0 = 1 so N = 100,000 (as we need) so now use your calculator for 1.25^2, 1.25^3 etc and mark the points accordingly. You will find that the curve gets steeper and steeper until (if you were to continue it far enough) it would be just about vertical.