1) Which table of values does not represent a linear relationship? Х
Х
(4)
(1)
(2)
(3)
Х f(x)
f(x)
х
Х f(x)
f(x)
-2 3.5
13
0 3
0 1
1
-1 3
2 11
1
7
3
2.
19
4
0 2.5
2
3
9
1
6 27
3 27
4 -5
2
1
8 35
4 81
5 -11
2 1.5
2) The table represents the function f(x). The equation that represents this function is
(1) f(x) = x + 2
f(x)
(3) f(x) = 2x
-2 +
(2) f(x) = x2
(4) f(x) = 24
-1
0 1
1 2
2 4
3) Which type of function best models the table?
х f(x)
(1) linear function with a negative rate of change
0 500
(2) linear function with a positive rate of change
480
(3) exponential decay function
2 460
3 440
(4) exponential growth function
4
420
1
4) You can work a total of no more than 41 hours each week at your two jobs. Housecleaning
pays $8 per hour and your sales job pays $5 per hour. You need to earn at least $254 each
week to pay your bills.
Write a system of inequalities that shows the various numbers of hours you can work at each
job.
If you work 25 hours at your housecleaning job, what is the minimum hours you need to work
at your sales job to pay your bills?
18