by BlastRoom
Writing and reading a parabola from its focus and directrix.
#algebra_2

40 questions
One question set, multiple game modes. Tap any game to see it in action. Not sure which to pick?
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Outrun the snow together.
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More correct answers pulls the rope your way.
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A parabola has focus (-3, -5) and directrix y = 5. What is its vertex?
In which direction does the parabola open, and where is its vertex?
A parabola has focus (-5, -4) and directrix y = 6. What is its vertex?
The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

For , a student writes the directrix as y = -6, reasoning that the directrix sits on the same side as the focus. What is the correct directrix?
Use the graph of the parabola. What are its focus and its directrix?

For the parabola , what are the focus and the directrix?
A parabola has focus (0, -3) and directrix y = 5. What is its vertex?
A parabola has focus (0, 7) and directrix y = -7. What is its equation?
The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

Use the graph of the parabola. What are its focus and its directrix?

In which direction does the parabola open, and where is its vertex?
A parabola has focus (6, 1) and directrix y = -5. What is its vertex?
For the parabola , what are the focus and the directrix?
Use the graph of the parabola. What are its focus and its directrix?

For the parabola , what are the focus and the directrix?
A parabola has focus (-5, -6) and directrix y = 2. What is its vertex?
For the parabola , what are the focus and the directrix?
A parabola has focus (5, 6) and directrix y = -6. What is its vertex?
In which direction does the parabola open, and where is its vertex?
For the parabola , what are the focus and the directrix?
For , a student writes the directrix as y = -1, reasoning that the directrix sits on the same side as the focus. What is the correct directrix?
The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

The graph shows a parabola, its focus (the dot) and its directrix (the dashed line). What is its equation?

In which direction does the parabola open, and where is its vertex?
A parabola has focus (-3, 3) and directrix y = -1. What is its vertex?
For , a student writes the directrix as y = 2, reasoning that the directrix sits on the same side as the focus. What is the correct directrix?
For the parabola , what are the focus and the directrix?
In which direction does the parabola open, and where is its vertex?
For , a student writes the directrix as y = -4, reasoning that the directrix sits on the same side as the focus. What is the correct directrix?
For the parabola , what are the focus and the directrix?
In which direction does the parabola open, and where is its vertex?
A parabola has focus (0, 6) and directrix y = -6. What is its equation?
A parabola has focus (2, -5) and directrix y = 5. What is its vertex?
Use the graph of the parabola. What are its focus and its directrix?

In which direction does the parabola open, and where is its vertex?
In which direction does the parabola open, and where is its vertex?
For , a student writes the directrix as y = -7, reasoning that the directrix sits on the same side as the focus. What is the correct directrix?
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Answer, then swat bugs for bonus points.
Race through questions at your own speed.
Same question on every screen. Fastest wins.

Pick a tile, answer, hit bonuses and steals.
Hyperbolas
40 questions