How to draw a line in a series of points

This is image is after I did a centroid plotting. So how can I draw the line through

s = regionprops(Iskel,'centroid');
centroids = cat(1,s.Centroid);
imshow(maskedIbw)
hold on
plot(centroids(:,1),centroids(:,2),'b*')
hold off

Answer 1

[Jaap]

plot(centroids(:,1),centroids(:,2),'b-')

Answer 2

[Kim]

plot(centroids(:,1),centroids(:,2),'LineWidth',2,'Color','green')