Which quadratic function opens down and has a vertex with a negative y value?

A. f (x) = 5x^2-18

B. g (x) = - 4x^2+7x+20

C. h (x) = - 1/2 (x-9) ^2+1

D. j (x) = - 10 (x+6) ^2 - 3

Question

Londyn

Mathematics

13 October, 19:34

Which quadratic function opens down and has a vertex with a negative y value?

A. f (x) = 5x^2-18

B. g (x) = - 4x^2+7x+20

C. h (x) = - 1/2 (x-9) ^2+1

D. j (x) = - 10 (x+6) ^2 - 3

+2

Answers (1)

Know the Answer?

Killian Marshall · Answer 1

It's D.

Step-by-step explanation:

The function with a negative coefficient of x^2 will open downwards so its either B, C or D. The y value of the vertex is the last constant.

So the answer is D with negative y value - 3.

Which quadratic function opens down and has a vertex with a negative y value?A. f (x) = 5x^2-18B. g (x) = - 4x^2+7x+20C. h (x) = - 1/2 (x-9) ^2+1D. j (x) = - 10 (x+6) ^2 - 3

Which quadratic function opens down and has a vertex with a negative y value?

A. f (x) = 5x^2-18

B. g (x) = - 4x^2+7x+20

C. h (x) = - 1/2 (x-9) ^2+1

D. j (x) = - 10 (x+6) ^2 - 3