A company is selling a certain product. The demand function of the product is linear. The company can sell 1000 units when the price is ₹8 per unit and when the price is ₹4 per unit, it can sell 2000 units. The total revenue function (R(x)) is given by :

$\frac{-x}{250}+12$ $\frac{-x^2}{250}+12$ $\frac{x^2}{250}-12$ $\frac{x^2}{250}+12$

$\frac{-x^2}{250}+12$