Vertex+and+Axis+Symmetry+of+a+Quadratic+Function

The Vertex and Axis Symmetry of a Quadratic Function is the form where a,b, and c are real numbers and a is not equal to zero.
 * f(x) = ax^2 + bx + c **

The Domain of a Quadratic function is the set of all real numbers.

f(x) = -x^2 + 4x +5 graph: