"Error using mesh" code when trying to graph linear regressions

For some reason, with this code, i get a funny little blue figure with no mesh, and I have no idea what is going wrong with the code, does anybody else? Any assistance would be greatly appreciated!!

Also, for some reason, my labels aren't working either, i've never had matlab do that! I know I can use the 'tools' drop down menu in the figure, but if anyone knows why the code isn't working that would be awesome!

Answer 1

[Star Strider]

What are the sizes of ‘x1fit’ and ‘x2fit’?

My guess is that one of them is (1x1).

[Leesy]

I dont have sizes for them, is that the problem? Thats the whole code.

[Leesy]

x1fit is just a number, but idk how that could be.

[Walter Roberson]

Your code would have problems if min(x1) is within 25 of max(x1)