#6 how do i plug in the numbers given?

The area of a trapizoid is a= 1/2 times the height times the sum of the bases 

so you will take 1/2 times 8 times (48x+68 +9x+ 12)

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.