The equation yˆ=459.678x+1588.906 models the weekly profit of a business, in dollars, where x is the number of radio advertisements they air. what does the y-intercept of the equation represent in context of the situation? the cost of a radio advertisement is about $1600. without any radio advertising, the weekly profit would be about $1600. the cost of a radio advertisement is about $460. without any radio advertising, the weekly profit would be about $460.