Drag the point
A parabola is all points that are equidistant from a fixed point (Focus) and line (Directrix).
1
Explore the left side
2
Explore the right side
Adjust the slider
The distance from the vertex to the focus is .
Make to continue.
12345
Match the parts
Find the Focus and Directrix of:
Hint:
Focus
{{ s3_focusBox !== null ? `(0, ${s3_focusBox})` : 'Drop here' }}
Directrix
{{ s3_dirBox !== null ? `y = ${s3_dirBox}` : 'Drop here' }}
{{ token.label }}
Build the equation
Write the equation for the dashed parabola shown above.
1
{{s4_denom}}
Mastered!
You understand how the focus and directrix define a parabola.