A savings account starts with $2,200. The total amount after 18 months was $2563. What is the annual interest
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Answer:
Step-by-step explanation:
Equation of the line: y= mx +b
y = 3x + b
Substitute ((-1 , 6) in the above equation
6 = 3*(-1) + b
6 = -3+b
6 +3 = b
b = 9
y = 3x + 9