# math homework

abdussamet akca
Homework3.docx

Name _______________________________________

MBA 501 Math & Stats for Business

Week 6 Homework Assignment

Instructions

1. This assignment is to be done individually . This is not a group assignment.

1. The homework assignment is due in the beginning of the next class. Please bring a hard copy with you to the class.

1. If you have difficulty printing the assignment, please email the assignment to the instructor before the class.

1. Late or redone homework assignments will be accepted only at the final class (up to a total of two).

1. Only explained and detailed answers will be accepted.

1. Define, derive, and graph the following functions (Attention: graphs can be submitted separately in a hand drawn paper, make sure you put numbers, axes names, tables, and points coordinates. Please do not draw two random axes with no references on them):

(a to d 1 point each, e to j 2 points each)

a.

b.

c.

d.

e.

f.

g.

h.

i.

j.

2. Case Study (1 point each)

The approximate average times (in minutes per month) spent on Facebook per unique visitor in the United States on a mobile device are given in the following table for the last six months of 2012 and first two months of 2013. (Data from: www.comScore.com.)

 Month July 2012 August 2012 Sept. 2012 October 2012 Nov. 2012 Dec. 2012 Jan. 2013 Feb. 2013 Minutes 500 510 520 580 615 700 760

a. Let x = 0 correspond to July 2012. Use the data points from July, 2012 and February, 2013 to find a function of the form that models these data.

b. Use exponential regression to find a function g that models these data, with x = 0 corresponding to July, 2012.

c. Assume the model remains accurate and estimate the minutes per month in April, 2013.

d. According to this model, when will the minutes per month reach 1000?