Until recently, hamburgers at the city sports arena cost $2.50 each. The food concessionaire sold an average of 3,500 I6- hamburgers on game night. When the price was raised to $3.20, hamburger sales dropped off to an average of 2,800 per night. The concessionaire's xed costs were $5,319.30 per night and the variable cost was $0.34 per hamburger. A Answer the following questions (A) through (F). E (A) Assume that the relationship between price p and demand x is linear. Express p as a function of x and nd the domain of this function. P=D