### Calculating the price elasticity of supply

Suppose the supply for good x is estimated by the following equation: Q(x) supplied = 4 + 0.8P(x) - 0.2P(x)expcted - 0.4W Where; Q(x) supplied = quantity supplied of x P(x) = current average good of x P(x) expected = expected price of good x W = average wage rate Suppose; P(x) = $5 P(x) expected = $6 W = $4.5