How to find the focus and directrix when your vertex is at origin

How to find the focus and directrix when your vertex is at origin

Assessment

Interactive Video

Mathematics

11th Grade - University

Hard

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The video tutorial explains how to analyze a parabola given the equation X^2 + 6Y = 0. It covers determining the orientation of the parabola, finding the vertex, focus, and directrix, and calculating the value of P. The tutorial also includes a sketch of the parabola, emphasizing the importance of understanding the value of P in relation to the vertex and focus.

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7 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in determining the direction a parabola opens?

Calculate the focus

Identify the squared variable

Find the vertex

Determine the directrix

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you identify the vertex from the equation X^2 = -6Y?

By finding the value of P

By rewriting the equation in vertex form

By identifying the axis of symmetry

By calculating the directrix

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the value of P represent in the context of a parabola?

The distance from the vertex to the directrix

The distance from the vertex to the focus

The direction the parabola opens

The axis of symmetry

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the focus of a parabola determined?

By finding the axis of symmetry

By calculating the directrix

By adding P to the vertex

By subtracting P from the vertex

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the value of P being negative in this context?

The parabola opens to the left

The parabola opens to the right

The parabola opens downwards

The parabola opens upwards

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the relationship between the focus and the directrix in a parabola?

They are the same point

They are equidistant from any point on the parabola

The directrix is always above the focus

The focus is always on the directrix

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How is the directrix of a parabola found?

By calculating the focus

By finding the axis of symmetry

By subtracting P from the vertex

By adding P to the vertex