Answer:
The answer is the second one
Step-by-step explanation:
Answer:
I would choose f(x)= 3|x-1|
Step-by-step explanation: These are the point on the graph.
(X,Y)
-1,6
0,3
1,0
2,3
3,6
The middle section is n(n+1)
The top row is n+2
The bottom row is 2n+1
So the rule for the total number of tiles will be the sum of the above rules...
s(n)=n(n+1)+n+2+2n+1
s(n)=n^2+n+n+2+2n+1
s(n)=n^2+4n+3
28=(2+x)+x
-2 -2
_________
26=x+x
26=2x
Divide both by 2
13=x
length=15 width=13