Housing vouchers are a better option than rent controls when a government is attempting to make housing affordable for the poor. The reason is that the housing voucher entitles the tenants to:

The option (b) 2.4 is correct.

Explanation:

We can find price elasticity of demand by using the formula shown in the attachment attached with.

Since we know the quantities of product associated with the market price of the product, by putting values in the equation we have:

Price elasticity of Demand =

= [(6000 - 4000) / (6000 + 4000)/2] / [(13 - 11) / (13+11)/2]

Price elasticity of Demand = 2.4

So this is how we can find the price elasticity of supply which says that the producers will respond to prices drop by producing lower quantity of product.