From 1983 to 2003, the numberB

B of federally insured banks could be approximated byB(t)=321.6t+13745

B(t)=-321.6t+13745 where t is the year and t=0 corresponds to 1983.

How many federally insured banks were there in 1988?

Find the slope of the graph of B.

Interpret this slope as a rate of change. Choose the correct answer below.

• The number of banks decreased by 321.6 banks per year
• The number of banks increased by 321.6 banks per year
• The number of banks increased by 13745 banks per year
• The number of banks decreased by 12137 banks per year
• The number of banks decreased by 13745 banks per year
• The number of banks increased by 12137 banks per year

Find the y-intercept of the graph of B.

The y-intercept is

Interpret the y-intercept. Choose the correct answer below.

• The y-intercept is the minimum number of banks allowed in the country
• The y-intercept is the number of banks in 1988
• The y-intercept is the maximum number of banks allowed in the country
• The y-intercept is the number of banks in 2003
• The y-intercept is the number of banks in 1983