How to scale x-axis in MatLab?

Temp = [100,75,50,25,0,-25,-50,-65,-75,-85,-100,-125,-150,-175];

Impact_Energy = [89.3,88.6,87.6,85.4,82.9,78.9,73.1,66,59.3,47.9,34.3,29.3,27.1,25];

plot(Temp,Impact_Energy,'r*')
title('Impact Energy V. Temperature') 
xlabel('Temperature, measured in C') 
ylabel('Impact Energy, measured in J')
set(gca, 'XLim', [-190, 200], 'XTick', -190:10:200,...
    'XTickLabel', -190:10:200);