Answer:
1
Step-by-step explanation:
One member in the graph only went one time which is fewer than two times.
58 es la respuesta perdón si espkis inglés
Answer:
1. 
2.

Step-by-step explanation:
For case 2 the population grows by 170 per year. Therefore for year t=0 its 2000 and t=1 then the population is 2170 and t=2 population is 2340. We can express the sequence as:

We know the difference is d=170 and n=1,2,3....:
Case two can be define by:

