Consider the parabola y=x2−6x+4.
What is the axis of symmetry? x=
Compute the coordinates of the vertex: (
,
)
compute the y-intercept as a point: (
,
)
find the point symmetric to the y-intercept:
Axis of symmetry:
y-coordinate of vertex:
Coordinates of the vertex:
Substitute 0 for x in the equation, and compute to get the y-intercept!