Which of the following sets of data does not represent a function?

set a
x
y
6
3
8
4
5
7
9
2

set b
x
y
0
3
1
8
2
8
3
-7

set c
x
y
10
7
20
11
30
9
40
7

set d
x
y
3
9
2
2
8
-3
2
1
a.
set a
b.
set b
c.
set c
d.
set d

Cherie measures and records the lengths and sizes of the same style of a sandal found at a shoe store. which equation can be used to determine the approximate shoe size, s, for a foot length of x inches? s = x – 2 s = 2x – 10 s = x + 6 s = 2x + 4

In 2009, there were 1570 bears in a wildlife refuge. in 2010, the population had increased to approximately 1884 bears. if this trend continues and the bear population is increasing exponentially, how many bears will there be in 2018?

How many ordered pairs of positive integers satisfy xy=32?