From 1986 to 2010, the number B of federally insured banks could be approximated by B(t) = 322.615 l 13776 where t is the year and t=0 corresponds to 1986. How many federally insured banks were there in 1991? Find the slope of the graph of B. [: Interpret this slope as a rate of change. Choose the correct answer below. 0 The number of banks increased by 322.6 banks per year Q The number of banks decreased by 13776 banks per year Q The number of banks decreased by 322.6 banks per year Q The number of banks increased by 12163 banks per year Q The number of banks decreased by 12163 banks per year Q The number of banks increased by 13776 banks per year Find the y-intercept of the graph of B. Interpret the y-intercept. Choose the correct answer below. 0 The y-intercept is the number of banks in 1986 O The y-intercept is the maximum number of banks allowed in the country O The y-intercept is the number of banks in 1991 O The y-intercept is the minimum number of banks allowed in the country 0 The y-intercept is the number of banks in 2010