Complete the table at right.
How many stamps will Lona have in one year from now?
Write an equation using function notation to represent the total number of stamps that Lona has in her collection after n months. Let the total be represented by t(n).
Solve your equation from part (c) for n when t(n) = 500. Will Lona be able to fill her book exactly with no stamps remaining? How do you know? When will the book be filled?
Continue adding 12 to find months 2-5.
Continue the table to month 12.
Remember that the initial amount was 120 stamps and the rate is 12 stamps per month.
t(n) = 120 + 12n
Substitute 500 for t(n).
500 = 120 +12n