You work for Price WatermanCoopers as a market analyst. PWC has been hired by the owner of two Burger King restaurants located in a suburban Atlanta market area to study the demand for its basic hamburger meal package$-$referred to as "Combination $1"$ on its menus. The two restaurants face competition in the Atlanta suburb from five other hamburger restaurants $($three MacDonald$$s and two Wendy's restaurants$)$and three other restaurants serving "drive$-$through" fast food $($a Taco Bell, a Kentucky Fried Chicken, and a small family$-$owned Chinese restaurant$).$

The owner of the two Burger King restaurants provides PWC with the data shown in Table $1.$Q is the total number of Combination $1$ meals sold at both locations during each week in $1998.$P is the average price charged for a Combination $1$ meal at the two locations.$[$Prices are identical at the two Burger King locations. Every week the Burger King owner advertises special price offers at its two restaurants exclusively in daily newspaper advertisements. A is the dollar amount spent on newspaper ads for each week in $1998.$The owner could not provide PWC with data on prices charged by other competing restaurants during $1998.$For the one$-$year time period of the study, household income and population in the suburb did not change enough to warrant inclusion in the demand analysis.