Number of factories
449
425
401
377
353
330
306
282
258
234
210
4
5
6
7
8
9
10
11
12
13
The X-axis in the diagram shows:
Days
The Y-axis in the diagram shows:
Number of factories
X:
4
5
6
7
8
Y:
210
238
277
302
328
X:
9
10
11
12
13
Y:
348
378
401
427
449
