7.19 Unit Test: More Math Models - Part 2 2. The graph shows the vertical displacement y, in centimeters, that a weight bouncing from a spring would achieve if there were no friction, for a given number of seconds, x.
(the file has the test with the graph)
(a) What is the weight’s maximum displacement? show your work

(b) From its resting position, how long does it take the weight to bounce one direction, then the other, and then return to its resting position? show your work

(c) What is the graph’s frequency and what does it indicate in this situation? show your work

(d) How is the weight moving during the time period x = 6 to x = 7.5? show your work

(50 ) mrs. julien’s and mrs. castillejo’s classes are selling cookie dough for a school fundraiser. customers can buy packages of macadamia nut chip cookie dough and packages of triple chocolate cookie dough. mrs. julien’s class sold 25 packages of macadamia nut chip cookie dough and 30 packages of triple chocolate cookie dough for a total of $221.25. mrs. castillejo’s class sold 5 packages of macadamia nut chip cookie dough and 45 packages of triple chocolate cookie dough for a total of $191.25. (a) write the system of equations that model the problem. be sure to explain which equation represents which situation. (b) find the cost of each type of cookie. show your work. (c) explain which method you used to solve the system and why you chose that method.