Question

In what direction does the graph of y = x2 -8x + 16 open?



A. Opens up
B. Opens down
C. Opens right
D. Opens left

Answer 1

@SACAPUNTAS

Answer 2

For a parabola, if a is positive, it opens up. If a is negative, it opens down.

Answer 3

it doesn't show a graph

Answer 4

y=ax²+bx+c
Up if a is positive, down if a is negative

x=ay²+by+c
Right if a is positive, left if a is negative

Answer 5

You don't need it!
I was telling you how to figure that out based on the value of a.
(Remember the form \(ax^2+bx+c\)?)

Answer 6

oh ok, but for the question does I open up?

Answer 7

Yes. Because a is positive.
(And, as mentioned above, it's in terms of y)

Answer 8

ok thank u