Final answer:
The variable 'BR' in the equation given by the real estate agent stands for the bedroom count of the house and is used to calculate its approximate value. The correct answer is option a.
Step-by-step explanation:
The equation provided by the real estate agent for approximating the value of a house is SP= 125,000 + 3000⋅ BR + 500⋅BDR+4000⋅WC−6000P. Based on the context of the question, BR represents the bedroom count. This is a common factor used in real estate to determine the value of a house.
As the number of bedrooms can significantly influence a property's market value. From there, you can solve for the value of SP, which represents the estimated value of the house. For instance, if we were to calculate the approximate selling price (SP) for a house with 7 bedrooms (BR).
No additional bonuses or penalties (BDR, WC, P are not specified), the equation would be: SP = 125,000 + 3000⋅7 = 125,000 + 21,000 = $146,000.