I'm not really sure, but I think the answer is D
The interest rate is 3.5%.
EXPLANATION
We substitute the given values into the formula;

to obtain

We divide through by 6000 to obtain,

This implies that,

We take the square root of both sides,

This gives us,

Add -1 to both sides of the equation to obtain

Multiply through by 100 to obtain;

%
The right answer is -2585
Answer:
the slope is 3/1 so if the point before your answer is (2,6) the add 3 to six and 1 to 2 and your answer is (3,9).
hope this helps