You buy a shirt that cost $7 and every additional shirt costs $5. Let f(n) be total costs of shirts. What kind of sequence is f.

Question

A clothing store is having a sale on T-shirts. The first t-shirt you buy cost $7, and every additional shirt costs only $5. Let f (n) be the total cost o n shirts. f is a sequence,. What Kind of sequence is it

Answer 1

$5 is the common difference. The sequence is arithmetic

f(n) = 7 + (n - 1)5