The parabola y=a x^{2}+b x+c has vertex (p, p) and y-intercept (0,-p), where p \neq 0. What is b ?
Answer Choices
A. -p
B. 0
C. 2
D. 4
E. p
The parabola y=a x^{2}+b x+c has vertex (p, p) and y-intercept (0,-p), where p \neq 0. What is b ?
Answer Choices
A. -p
B. 0
C. 2
D. 4
E. p