Because the tell if he number is big or small
This needs some more detailed explanation but I think it's asking to divide 18 months by 18 to find the monthly rate and then multiply by 12 and add I and P???
I honestly don't understand the question so please add more :P
The graph that best represents the function in this case, will be given by evaluating x in the function sometimes to build the number of points needed to describe the straight line. In this case, the graphic is shown in the attached file
x= <span> 0 <span>1
2
3
4
5
6
7
8
9
<span>
10
</span></span></span><span><span> F(x)= 6 4
</span>
2
0
-2
-4
-6
-8
-10
-12
-14
</span><span>zero is at x = 3!!!</span>