If the equation is x^2-49=y, and I were to use the x=-b/2a formula to find the axis of symmetry of the parabola, what would my b value be?

If i'm correct the answer is $15.97

Idon't see any graph, however the graph of the function : f(x) = x²-2x+3 is a parabola: 1) open upward (since a> 0)2) it intersects y-axis in 3 (y=3)3) its axis of symmetry is x = +1 ( -b/2a)4) it's minimum is y = -2, so its vertex is (1,-2)5) it doesn't intersect the x-axis since discriminant < 0