FERMAT 2007 Problem 24

A line with slope 1 passes through point P on the negative x- axis and intersects the parabola y=x^2 at points Q and R, as shown. If PQ=QR, then the y- intercept of PR is closest to
2007-24a

Answer Choices
A. 9.9
B. 10.2
C. 8.2
D. 9.3
E. 8.6