9
QuizMultiple Choice

Conic Sections — Quiz

Question 9 • Precalculus

Consider the equation y minus 4 is equal to 2 times open paren x plus 3 close paren squared Where is the vertex located, and in which direction does the parabola open?

Answer
A
vertex: open paren negative 3 comma 4 close paren ; parabola opens to the right
B
vertex: open paren negative 3 comma 4 close paren ; parabola opens up
C
vertex: open paren 3 comma negative 4 close paren ; parabola opens up
D
vertex: open paren 3 comma negative 4 close paren ; parabola opens to the right

Explanation

Rewrite the equation as y = 2(x + 3)² + 4. This matches vertex form y = a(x − h)² + k, so the vertex is (h, k) = (−3, 4). Since a = 2 is positive, the parabola opens up. Therefore, the correct choice is the vertex at (−3, 4) with the parabola opening up.

AI-written and checked against the verified answer.

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