Lt. Gov. Karyn Polito hailed the public-private partnerships promoted by the Baker administration at the Greater Holyoke Chamber of Commerce’s annual Governmental Affairs Luncheon. The Wherehouse? Banquet Hall hosted the chamber’s event Thursday. Polito noted the commonwealth’s continued collaborations with the business community. She used Holyoke as “Exhibit A” in describing those relations, with the keys being planning, people, places and partnerships. Polito said the state extends grants, low-interest funding and tax credits to businesses that promote expansion, innovation and workforce development.