SOLUTION: 8. Use the following equation to answer the following question. y = x^2 - 2x - 15 What is the equation of the axis of symmetry? A. x = -1 B. x = 1 C. y = -1 D. y

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: 8. Use the following equation to answer the following question. y = x^2 - 2x - 15 What is the equation of the axis of symmetry? A. x = -1 B. x = 1 C. y = -1 D. y       Log On


   

Question 792012: 8.
Use the following equation to answer the following question.
y = x^2 - 2x - 15
What is the equation of the axis of symmetry?
A. x = -1
B. x = 1
C. y = -1
D. y = 1
Answer by waynest(281) About Me  (Show Source):
You can put this solution on YOUR website!
y = x^2 - 2x - 15
y = x^2 - 2x + (2/2)^2 - (2/2)^2 - 15
y = x^2 - 2x + 1 - 1 - 15
y = (x -1)^2 - 16
axis of symmetry: x = 1