What are the commands to plot multiple lines in Matlab using hold command?

%This code will plot three lines on same plot.

x1=[2 3 4 5 6 8 10];

y1=[9 4 3 2 7 4 2];

x2=[11 20 30 50 60 50 40];

y2= [20 30 50 60 20 30 10];

x3=[2 3 4 5 8 6 4];

y3=[9 4 3 2 4 6 8];

plot(x1,y1,'r') 

hold on 

plot(x2,y2,'g')

hold on 

plot(x3,y3,'b')

hold off