Question

What is the vertex of the graph of y = −2x^2 + x + 3?

Answer 1

general form of this type of equation:\[y=ax ^{2}+bx +c\]
vertex of this parabola is: -b/2a
in your case a=-2, b=1

Answer 2

The derivative of a graph shows you the slope at any point on the other graph. So where the slope of the graph is 0, then you have the vertex.

Answer 3

^ assuming you're in calculus.

Answer 4

:)

Answer 5

Method 3:
covert the equation into vertex form. ;)

Answer 6

-1/4

Answer 7

?

Answer 8

i need another fraction though -1/4 isnt the only one how do i get the other fraction

Answer 9

@myko

Answer 10

@Kainui

Answer 11

the answer should be 1/4, not -1/4. And the parabola has only one vertex

Answer 12

but the have it as (1/4,25/8) or (1/4,27/8). which one do i choose @myko

Answer 13

the choices i meant

Answer 14

it is (x,y) so find y value for x=1/4. For that plug x=1/4 in to the equation

Answer 15

ok i can do that thanks

Answer 16

y = −2*(1/4)^2 + (1/4) + 3

Answer 17

25/8 is th y value!!!! thanks myko

Answer 18

yw