Lesson 7

Are You Ready?

 

Complete these questions. If you experience difficulty and need help, visit Refresher or contact your teacher.

1. Logos-to-Go is a company that travels around Alberta supplying teams with hoodies featuring unique logos. The company needs to buy the plain hoodies in bulk to help save money. However, Logos-to-Go does not want to be left with too much stock at the end of each season. The price per hoodie is related to the size of the bulk order. Seven of Logos-to-Go past orders are listed in the following table:
   
   

   Number of Hoodies	Cost per Hoodie ($)
   400	22
   600	19
   250	27
   720	18
   330	25
   820	16
   500	21

   1. Use technology to create a scatter plot and determine an equation for the linear regression function that models this data. Answer
   2. What do the slope and y-intercept in the regression equation represent in this question? Answer
   3. Use the linear regression function model to extrapolate and find the size of order needed to achieve a cost of $15 per hoodie. Answer
2. Chuck is a pitcher for his local slow-pitch team. The height of the ball after being pitched is listed in the following table:
   
   

   Time (s)	0	0.33	0.67	1.0	1.3
   Height (m)	1	2.8	3.5	3.1	1.6

   1. Use technology to create a scatter plot and determine an equation for the quadratic regression function that models this data. Answer
   2. Using your model, what is the maximum height that the ball will reach? Answer
   3. State appropriate values for domain and range in this situation. Answer

If you answered the Are You Ready? questions without difficulty, move to Discover.

 

If you found the Are You Ready? questions difficult, complete Refresher.