Work Step by Step
When looking at the equation's coefficients, we can determine the a,b, and c values. a=-1, b=0, c=-6. This equation has a positive coefficient so it opens downwards. To find the axis of symmetry for this equation, use the formula -b/2a. Plug in your a and b values into this formula to get the answer 0. Since answer choice D is the only answer with the axis of symmetry x=0 and opens upwards, D is the correct answer.