# Match the letter of the choice most associated with the term given.

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A. `-b/(2a)` gives the x-coordinate of the vertex of the parabola if `y=ax^2+bx+c`

B. `y=x^2` is the prototypical parabola -- it is the base function you normally consider when looking at transformations. (The parent function.)

C. `b^2-4ac` is the discriminant -- the sign of the discriminant tells you how many solutions and of what type there are for a quadratic equation.

D. `y=a(x-h)^2+k` is the vertex form of a quadratic -- the vertex is at (h,k)

E. `x=(-b+-sqrt(b^2-4ac))/(2a)` is the quadratic formula -- if `y=ax^2+bx+c` then the formula gives the solutions.

6. B

7. A

8. E