"Working as an insurance salesperson, Emma earns a base salary plus a commission on each new policy. Therefore, Emma’s weekly income, I, depends on the number of new policies, n, she sells during the week. Last week she sold 3 new policies, and earned $760 for the week. The week before, she sold 5 new policies and earned $920. Find an equation for I(n), and interpret the meaning of the components of the equation"