6 Book sales in the U. S. totaled $16 billion in 1991. Sales increased about $1 billion a year until 2014. Write an equation to find the total sales (S) for any year (t) between
1991 and 2014. If this trend continues, what should sales be in 2020?
7
About 20,000 fewer babies were born in California in 1996 than in 1995. In 1995, about
560,000 babies were born. Write an equation that can be used to predict the number of
babies born (x) years after 1995 if this trend continues.