t = [0, 1, 1.5, 2, 2.5, 3, 3.5, 4, 4.5, 5.5, 6, 6.5, 7];
y = [0.394, 0.391, 0.453, 0.595, 0.887, 1.232, 1.911, 2.694, 2.925, 3.425, 3.48, 3.515, 3.505];

plot (t,y, '-r');
xlabel('Time (hour)'); ylabel('OD (Optical Density) 600');
title('The growth curve given by experiment');