How to extend curve fitting line beyond data points on Curve fitting toolbox?

Hi, Does anyone know how to extend the curve fitting line on the toolbox?

I have attached an image, and essentially i would like it to reach 5x10^4.

Cheers

[madhan ravi]

It’s not a good fit ,upload your code with the required datas

[Naveed Hossain]

That's the generated code

 function createaxes(Parent1, XData1, YData1, XData2, YData2)
  %CREATEAXES(Parent1, XData1, YData1, XData2, YData2)
  %  PARENT1:  axes parent
  %  XDATA1:  line xdata
  %  YDATA1:  line ydata
  %  XDATA2:  line xdata
  %  YDATA2:  line ydata

%  Auto-generated by MATLAB on 21-Oct-2018 12:43:47

% Create axes
axes1 = axes('Parent',Parent1,'Tag','sftool surface axes');
hold(axes1,'on');

% Create line
line(XData1,YData1,'Parent',axes1,'DisplayName','Dmge vs. flow1',...
    'MarkerFaceColor',[0 0 0],...
    'MarkerEdgeColor',[0 0 0],...
    'MarkerSize',3,...
    'Marker','o',...
    'LineStyle','none');

% Create line
line(XData2,YData2,'Parent',axes1,'DisplayName','untitled fit 1',...
    'LineWidth',1.5,...
    'Color',[0.0705882352941176 0.407843137254902 0.701960784313725]);

% Create zlabel
zlabel('Z');

% Create ylabel
ylabel('Damage ($000 USD)');

% Create xlabel
xlabel('Flow A');

% Create title
title('Damage vs Flow A');

% Uncomment the following line to preserve the X-limits of the axes
% xlim(axes1,[-1259 50000]);
% Uncomment the following line to preserve the Y-limits of the axes
% ylim(axes1,[-1136 24374]);
% Uncomment the following line to preserve the Z-limits of the axes
% zlim(axes1,[-1 1]);
box(axes1,'on');
grid(axes1,'on');
% Set the remaining axes properties
set(axes1,'FontSize',14,'FontWeight','bold');

Answer 1

[Naveed Hossain]

I didn't write a code. I just used the curve fitting tool box on MATLAB.

I am not really concerned with the quality of the fit, rather I would like the line of fit to not stop where the data is, but to go on onto the end of the x-axis.