Next time, please include the instructions with your post.
The formula for simple interest is i = p*r*t, where r is the annual interest rate expressed as a decimal fraction.
Here, $16 = $200*r*2, with r being the unknown.
Solving for r: r = $16 / $400 = 0.04 (answer)
Answer:
The rate change between these points is 3.
Step-by-step explanation:
A=34.547237
b=2.547237
determined by trial and error with a calculator