12.1 Parabolas

Parabolas ... and circles and ellipses too!

And again: Sketch the graph, identify the vertex, focus, equation of the axis of symmetry and the equation of the directrix.

the appropriate coordinate of the

the appropriate coordinate of the

Sketch the parabola defined by each equation, showing the coordinates of the focus and the equation of the directrix. Also write the equation of the axis of symmetry and the coordinates of the vertex.

Now, let's explore how we move from the standard form to the general form and back again ...

The Circle

standard form for the equation of a circle

Which equations represent circles? Find the radius, and the coordinates of the centre of each circle.

Which equations represent circles? Find the radius, and the coordinates of the centre of each circle.