SOLUTION: Help!! I do not understand the text or the examples. Find the vertex, line of symmetry, and the maximum or minimum value of f(x). Graph the function. f(x)=-4(x+7)^2+8 f(x)=-(x

Algebra ->  Quadratic Equations and Parabolas -> SOLUTION: Help!! I do not understand the text or the examples. Find the vertex, line of symmetry, and the maximum or minimum value of f(x). Graph the function. f(x)=-4(x+7)^2+8 f(x)=-(x      Log On


   

Question 468293: Help!! I do not understand the text or the examples.
Find the vertex, line of symmetry, and the maximum or minimum value of f(x). Graph the function.
f(x)=-4(x+7)^2+8
f(x)=-(x+6)^2-7
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,

the vertex form of a parabola, y=a%28x-h%29%5E2+%2Bk where(h,k) is the vertex

f(x)= -4(x+7)^2+8   V(-7,8) a maximum, parabola opens downward a = -4 a <0

                   Line of symmetry is x = -7

 

f(x)= -(x+6)^2-7   V(-6,-7) a maximum, parabola opens downward a = -1 a <0

                   Line of symmetry is x = -6