1969 AHSME Problems/Problem 7

Problem

If the points $(1,y_1)$ and $(-1,y_2)$ lie on the graph of $y=ax^2+bx+c$ , and $y_1-y_2=-6$ , then $b$ equals:

$\text{(A) } -3\quad \text{(B) } 0\quad \text{(C) } 3\quad \text{(D) } \sqrt{ac}\quad \text{(E) } \frac{a+c}{2}$

$\fbox{A}$

1969 AHSME (Problems • Answer Key • Resources)
Preceded by Problem 6	Followed by Problem 8
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