Question

Which of the following is the equation of the axis of symmetry of the quadratic equation y = 2(x + 7)2 – 4?

a) x= -7
b) x= -4
c) x=7
d) x=4

Answer 1

hint: the axis of symmetry for the general equation

y = a(x-h)^2 + k


is (h,k)

Answer 2

also, you can rewrite the given equation into

y = 2(x-(-7))^2 - 4

Answer 3

so x= -7?

Answer 4

yep

Answer 5

yay thank you!

Answer 6

oops made a typo above and meant to say the axis of symmetry is x = h and not (h,k)


but you caught that