The ratio of used cars to new cars sold at a dealership last year was 4 to 6. Last year, 200 more new cars than used cars were sold at the dealership. How many cars were sold in all?

72 is the mode because it shows up the most number of times

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.