Refer to the Following Equation: Q^s = $\beta$ ₁ $\beta$ ₂P

Refer to the following equation: Q^s = $\beta$ ₁ + $\beta$ ₂P + $\beta$ ₃P^r + $\beta$ ₄P^s + $\beta$ ₅TAX + e
Where Q^s is annual quantity supplied,P is the price of the product,P^r is the price of resources,P^s is the price of goods that are substitutes in production,and TAX is the excise tax on the product.This equation is

A) an economic model
B) an econometric model
C) a market model
D) a non-linear model