A
B
C
D
2
4
5
6
8
10
1
3
region 1
region 2
region 3
region 4
>
<
up
down
steeper
less steep
twice
two more than
two less than
one-half
f(x)
g(x)
h(x)
j(x)
k(x)
86400
79100
91400
68000
9
3x-15
9x+6
3x-2
3x+2
x-5
x+5