Are any of the places shown in the table closer than 1/2 mile to school

It's really hard to tell for anyone who can't see the table.
Sadly, you've left ALL of us in that awkward status.

What are the options

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.