Use the figure part 2

Question 13 of 451 pointwhich statement correctly describes the inverse of the following function? a. it is negative.b. it is a horizontal shift.c. it is not a function.d. it is a function. give an explanation as to why you chose that answer. (i think its either a or d.)

What is the standard deviation of the following data set rounded to the nearest tenth? 3, 17, 18, 15, 12, 21, 9

Find the perimeter of the figure shown above. a. 18 yds c. 20 yds b. 10 yds d. 24 yds select the best answer from the choices provided