(D) Price Elasticity of Supply = (% change in quantity supplied. / (% change in price) 1.5 = ((x-200)*100/200)/((10-8)*100/8) 1.5 = ((x-200)/2)/(200/8) 1.5 = ((x-200)/2)/25 1.5 = (x-200)/50 75 = x-200 x = 75+200 x = 275