How to plot them together and get the equasions of each of them ?

alpha=fitlm(RD,Wi);
plot(alpha);
r2=alpha.Rsquared.Adjusted;
r1=alpha.Rsquared.Ordinary;
xlabel('RD'),ylabel('ISCO');
beta=fitlm(RD,Wlr);
a=plot(beta);
xlabel('RD'),ylabel('LR');
rsqered=beta.Rsquared.Adjusted;
rsq=beta.Rsquared.Ordinary;
hold on 
X=plotAdded(alpha);
hold off
% I want to know how to plot them together, with different colors, and to have a legeng for them bot. 
% I also want to know the equation that describe them
% Can someone help me please??