Question

From the equation, find the axis of symmetry of the parabola.

y = 3x2 - 12x+11

a. x = -2
b. x = 2
c. x = 1
d. x = -1

Answer 1

B. x=2

Explanation:

The formula to find the axis of symmetry is -b/2a.

So, in this case, we find our b and a, which are 3 and -12.

Plug them into the formula.

-(-12)/2(3)

The negative sign times another negative makes it into a positive, now we have a positive 12 and then 2 multiplied by 3 equals 6.

Our new equation is 12/6.

Then, simply solve it, 12 divided by 6 equals 2.

Therefore, B would be your answer, x=2.