8. To have a birthday party at an ice-skating rink, Lizzy would pay $40 plus $18.25 per
person. To have a party at a trampoline park
she would pay $124 plus $7.75 per person. How
many people would Lizzy need to have at her
party for the cost of a party at the ice-skating
rink to be more than a party at the trampoline
park?

The variables should add up to equal 1

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.