Huw buys peanuts to feed the birds. He finds the following prices for buying peanuts.
Bird Feast
Cheep Feed
Kind to Birds
£16.20 for 12-55 kg
£32 for 25kg
£15.60 for 12 kg
Which of the above options is the best value for money?
You must show all your working.

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.

Where is the expression you want us to evaluate?