how to put a line by code in regression

So after two days, I finally got part of my code to work for my linear regression assignment for work. Unfortunately, I don't know how to put a best-fitted linear regression line in MATLAB in the plot for linear regression. What is the code to do so?

Also, I used polyfit(x,y,1) and my output is

ans = 
[-0.619    10.4846]

What is the code to write B0 and B1 on its own? I want my output to be like this:

b0 =
   -0.619 
b1 =
   10.4846

Answer 1

[Image Analyst]

I'd do something like this (untested)

% Do the regression:
coeffs = polyfit(xTraining, yTraining, 1);
% Print coefficients to command window
coeffs(1)
coeffs(2)
% Fit some new x range (may be higher resolution than the training x if you want).
x = linspace(startingX, endingX, numberOfSamples);
% Do the fit
yFitted = polyval(coeffs, x);
% Plot the fit.
plot(x, yFitted, 'b-', 'LineWidth', 3);
hold on;
% Along with it, plot the original training data:
plot(xTraining, yTraining, 'rs');