30 joey drives a golf cart when he needs to monitor the security of his neighborhood. he can cover the 40 miles of streets in his neighborhood in 2 hours. what unit rate expresses the speed of joey's golf cart per hour? 10 miles per hour 15 miles per hour 20 miles per hour 30 miles per hour

 20 miles per hour

The answer is 20 miles per hour because it takes him 2 hours to travel 40 miles and in 2 hours going 20 miles per hour you travel 40 miles. hope this helped let me know if it is correct.

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.