8th grade function homework

Name: _______________________                                    Date: _____________________

Group: ____________________                                           Prof. Jose Quinones

 Homework (20 pts)

 Write a function rule for each table.

x	f(x)
-4	-2
-2	-1
6	3
8	4

 

x	f(x)
-3	9
0	0
1	1
5	25

 

 

Find the range of each function when the domain is {0, 1, 5}

1.       f(x) = 2x^2 – x                   2.            f(x) = 27 – 3x                      3.            f(x) = -x + 8

 

Pens are shipped to the office supply in boxes of 12 each.

a.       Write a function to calculate the total number of pens when you know the number of boxes.

b.      Calculate the total number of pens in 16 boxes.

 

Write a function rule to determine the change you would get from a twenty-dollar bill when purchasing items that cost $1.25 each.

a.       Calculate the change when five of these items are purchased.

b.      Can you purchase 17 if these items with a twenty-dollar bill?