Mortgage interest rates hit a high of 21% in 1981. Over the next 32 years, interest rates
decreased by 69%. What was the interest rate
in 2013?
Round your answer to the nearest hundredth of
a percent

The correct answer is $90

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0