Question 1: Tia uses this recipes to make hot cross buns. Tia is going to use this recipe to make 9 hot cross buns.
makes 12
480g flour
60g caster sugar
200ml milk
(a) How much of each ingredient does Tia need?
Grace uses the same recipe.
She uses 500ml of milk.
1 egg
50g butter
100g currant
(b) How many hot cross buns is Grace making?​

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.