Question

What is the vertex of y = -x^2 + 4 ?

a. (0, -4)
b. (0, -2)
c. (0, 2)
d. (0, 4)

Answer 1

theres 0 adjustments to the x and +4 adjusted for the y

Answer 2

In general, what is a vertex in terms of a curve like that

Answer 3

Idk.. Lol.

Answer 4

if we start at (0,0) and adjust x by 0 and y by +4; where do we end up?

Answer 5

If your curve is shaped like U, then the vertex is the bit at the bottom of the U shape, where the curve changes from going down to going up again.

Answer 6

or in this case going up to going down. just thought i would mention it

Answer 7

Is it D?

Answer 8

id say its D just by a cursory glance

Answer 9

yup

Answer 10

here is a nice picture. you can see it sits right on (0,4) the highest point on the curve
http://www.wolframalpha.com/input/?i=y%3D-x^2%2B4