Asuka travels at an average speed of 50 mph for 20 miles. Without stopping, Asuka then travels 70 miles in 1.75 hours. Find her average speed for the entire journey to 2 dp.

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.

Ithink the answer is d.