For the top law firms in the world in terms of profit per equity partner, data file XR15012 lists the number of equity partners and the gross revenue ($ millions) for the most recent fiscal year. Given these data, determine the least-squares equation for predict- ing gross revenue on the basis of the number of equity partners, then interpret its slope. What would be the estimated gross revenue for a firm with 200 equity partners? Source: law.com, August 8, 2009.