Moderate# Finding Vertex and y-Intercept

GRE-G57E5E

Compare Quantity A and Quantity B.

Based on the quadratic $f(x)=2{ x }^{ 2 }+8x-1$:

**Quantity A**: the $y$-value of the vertex of $f(x)$

**Quantity B**: the $y$-intercept of $f(x)$

Which of the following statements is true?