A store sells comic books. Each comic book costs the same amount. During a sale, the store reduces the price of each comic book by $1.45. Miguel spends $12.88 on 2 comic books at the sale price.
What was the price of I comic book before the sale?

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.