Answer: 6.93 years
Step-by-step explanation:
Given
Rate of interest is 
Future value is given by 
For the investment to double itself, i.e. 

It takes around 6.93 years to double the investment.
X=1 and y=-2
In ordered pairs it would be (1,0) and (0,-2)
Answer:
0.05
Step-by-step explanation:
hope this helps! :D
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