Unit 2 Functions Review

• 7

• -7

• 5

• 0

• 0

• 7

• 1

• 11

• 1

• -2

• 2

• 0

• 7

• -7

• 11

• -11

A house initially costs $90,000.  The value, V, of the house after n years if it

     appreciates at a constant rate of 4.5% per year can be determined by the function

     V(n) = $90000(1.045)ⁿ. 

Determine V(12)

• $152,629

• $146,057

• 159,498

In 2009 there were 20 cases of swine flu in a town.  In 2011 there were 10 cases of swine flu in a town.  Find the rate of change from 2009 to 2011.

• 5

• -2

• -5

• 10

One day a group of pioneers founds the town of “Nowheresville.”  Three years after its founding, the population of Nowheresville is 80.  Five years after its founding the population of Nowheresville reaches 100. Write a linear equation to model this situation

• y=-10x+50

Suppose y varies inversely with x.
If y = 150 when x = 2, find y when x = 25.

• 300
• 75
• 1,875
• 12

Trina's paycheck earnings varies directly as the number of hours she works. If she works 19 hours and earns $187.15, what should she earn if she worked 40 hours? 

• $394
• $443.25
• $472.80
• $512.20

The amount of money earned on a job is directly proportional to the number of hours worked.  If $70.00 is earned in 5 hours, how much money is earned in 22 hours of work?

• $2
• $308
• $1.57
• $265