Question

Select the direction that this parabola opens.
y=-x^2/20

A) up
B) down
C) left
D) right

Answer 1

Hello,
x² 's coefficient is <0 ==> parabola opens down.

Answer B

Answer 2

Answer:

the parabola opens down

Step-by-step explanation:

Select the direction that this parabola opens.

y=-x^2/20

$y=\frac{-x^2}{20}$

To find the direction of the parabola y=ax^2 +bx+c ,we need to consider the value of 'a'

If 'a' is positive then the parabola opens up

If 'a' is negative then the parabola opens down

from the given equation

$y=\frac{-x^2}{20}$

The value of a=-1 which is negative

so the parabola opens down