The demand for a good is given by Q = 100 - 3P - 2PA + 0.3Y, where P is the price of the good, PA is the price of an alternative good, and Y is income. If P = 25, PA = 10, and Y = 1500, then the own-price elasticity of demand is (rounded up):
-0.165
-0.989
-0.25
-3.0
-0.044