I need to create the following plots in the same figure window but the green graph is remaining constant when it should be a negative graph

Whenever I run each graph separatly it displays correctly but when I try to have them all on the same plot using the hold on and hold off functions the green graph remains constant when it should be a negative sloping curve. Any suggestions?

%Increase=input('Enter percent of increase :')
%Decrease=input('Enter percent of decrease :')
%Remain_Constant=input('Enter 0 to remain constant :')
Increase=0.15;
Decrease=-0.1;
Remain_Constant=0;
years=[11:1:50];
%Current_value=Total_mismanaged_kg_year;
Current_value=3273763.092;
annual_rate_increase=Increase;
annual_rate_decrease=Decrease;
annual_rate_remain=Remain_Constant;
Future_growth_increase=(1+ annual_rate_increase).^years;
Future_growth_decrease=(1+ annual_rate_decrease).^years;
Future_growth_constant=(1+ annual_rate_remain).^years;
Future_value_increase=Future_growth_increase*Current_value;
Future_value_decrease=Future_growth_decrease*Current_value;
Future_value_remain=Future_growth_constant*Current_value;
%figure;plot(years,Future_value_increase,'b')
%hold on
%plot(years,Future_value_decrease,'g')
%plot(years,Future_value_remain,'r')
%hold off
figure;semilogy(years,Future_value_increase,'b')
hold on
semilogy(years,Future_value_decrease,'g')
semilogy(years,Future_value_remain,'r')
hold off

[Walter Roberson]

We need values for the variables in order to test -

[Allison Sims]

the percent of increase and decrease are up to the user and the current value is 3273763.092. The decrease input should be entered as a negative as well

[Torsten]

@Allison Sims

It doesn't remain constant (see above).

[Allison Sims]

It only works when the other graphs are commented out or ran in 3 separate figure windows I need them to be all in one plot

[Torsten]

My guess is that the values for the green graph are that low that they cannot be distinguished from the x-axis.

Try a logarithmic plot for the three curves (see above).