The graph below compares plant height to the age of the plant, in weeks.
Plant Height
0 0
00
Height (in.)
y y= 1.3x -0.8
+
9
-
1
2
3
7
8
9
X
4 5 6
Weeks
Based on the graph, which is the best prediction of the height of the plant at 5 weeks?
O4 inches