realtimefix247 realtimefix247 17-09-2017 Mathematics contestada Use a table of values to graph the following quadratic equation. y=‒x2+4x‒3 What is the vertex of this quadratic equation? (A.) (‒1, 9) (B). (2, 1) (C.) (‒4, 3) (D). (1, ‒9)