If the vertex of a parabola is (6,1) what is the equation for the axis of symmetry?
2 Answers
The axis of symmetry runs through the vertex.
So, if it is a vertical parabola (one that opens up or down) then the axis of symmetry is the vertical line through the vertex.
If it is a horizontal parabola (one that opens right or left) then the axis of symmetry is the horizontal line through the vertex.
If it is a slant (or skew) parabola, the the axis of symmetry is a slanted line through the vertex.
Assuming the parabola is in "standard" position (i.e. not rotated) and has a formula
Then if the vertex is at
the axis of symmetry is a vertical line through
and since a vertical line has the form
the equation for the axis of symmetry is
(Note that if the parabola has been rotated there is no way from the given information to establish the axis of symmetry).