How to plot point clouds and linear regression line in the same plot?

I have a linear regression with:

X=[-2,-1,0,1,2]';

Y=[0,0,1,1,3]';

p=polyfit(X,Y,1) %p=[0.7,1.00]

c=polyval(p,[2.5,3]) %c=[2.75,3.10]

Answer 1

[Star Strider]

Use the hold function.