Question

Which of the following is the equation of the axis of symmetry for the function?
y = x2 -4x + 8



x = -4

y = -2

x = 2

y = 2x

Answer 1

x = -b/2a, is the formula you need to find it

Answer 2

http://www.meta-calculator.com/online/?panel-102-graph&data-bounds-xMin=-10&data-bounds-xMax=10&data-bounds-yMin=-7.28&data-bounds-yMax=7.28&data-equations-0=%22y%3Dx%5E2-4*x%2B8%22&data-rand=undefined

Answer 3

y = ax^2 + bx + c

Answer 4

Find the vertex which is (2,4) and the axis of symmetry is your x value...so it will be x=2

Answer 5

All you have to do is type the function into a graphing calculator...