Question

Using the equation y = –5(x + 3)2 + 5, which statement is true, if any?

a. The parabola opens upwards and the directix is vertical.
b. The parabola opens downward and the directix is horizontal.
c. The parabola opens to the right and the directix is vertical.
d. The parabola opens to the left and the directix is horizontal.

Answer 1

@antonio_xx2 @ankit042

Answer 2

Where does it open ?

Answer 3

How do I figure that out

Answer 4

equation Opening

y=a(x-h)²+k up and down
x=a(y-k)²+h right and left

Answer 5

http://www.protutorcompany.com/wp-content/uploads/2013/05/Prob20130529FigA.png

Answer 6

if the "x" is the squared term... then the parabola is a "horizontal" one
if the "y" is the squared term,... then the parabola is a "vertical" one

if the number in front of the squared term is positive, it goes up OR right
if the number in front of the squared term is negative, it goes down OR left