Algebra II

Question

Find the axis of symmetry of the given function g(x) = 9x² - 90x + 228

1) x = 5

2) x = 0

3) x = -3

4) x = 3

Answer 1

 

Hi Carrie,

 

 

Find the axis of symmetry of the given function g(x) = 9x² - 90x + 228

1) x = 5

2) x = 0

3) x = -3

4) x = 3

 

The axis of symmetry for a quadratic equation is a vertical line and uses the x-coordinate of the vertex.

The x-coordinate of the vertex can be found using the formula
x=-b
    ---
    2a

for g(x) = 9x² - 90x + 228

a=9
b=-90
c=228

 

x=-(-90)

    ------

      2(9)

 

x= 90

    ---

     18

x=5

 

 

ANSWER:  Therefore, answer A is the correct response.