Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at...

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Notes Over 10.2 Graphing an Equation of a Parabola Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) py x 4 2 p , 0 focus y x 12 2 3 , 0 p y directr ix 3 y

Transcript of Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at...

Page 1: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaStandard Equation of a Parabola (Vertex at Origin)

pyx 42

p ,0focus

yx 122

3 ,0py

directrix3y

Page 2: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaStandard Equation of a Parabola (Vertex at Origin)

pxy 42

0 ,pfocus

xy 122

0 ,3px

directrix

3x

Page 3: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaGraph the equation. Identify the focus and directrix of the parabola.

yx 2 .1 2

focus:

2

1 ,0

directrix:2

1y

24 p2

1p

Page 4: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaGraph the equation. Identify the focus and directrix of the parabola.

xy 16 .2 2

focus: 0 ,4

directrix: 4x

164 p 4p

Page 5: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaGraph the equation. Identify the focus and directrix of the parabola.

yx4

1 .3 2

focus:

16

1 ,0

directrix:16

1y

4

14 p

16

1p

Page 6: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Graphing an Equation of a ParabolaGraphing an Equation of a ParabolaGraph the equation. Identify the focus and directrix of the parabola.

xy 4 .4 2

focus: 0 ,1

directrix: 1x

44 p 1p

Page 7: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

1 ,0 .5

Notes Over 10.2Writing an Equation of a ParabolaWriting an Equation of a ParabolaWrite the standard form of the equation of the parabola with the given focus and vertex at (0, 0).

yx 42 pyx 42

1 yx 42

0 ,

2

1 .6

xy 42

pxy 42

2

1 xy 22

Page 8: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

4

1 ,0 .8

Notes Over 10.2Writing an Equation of a ParabolaWriting an Equation of a ParabolaWrite the standard form of the equation of the parabola with the given focus and vertex at (0, 0).

yx 42

pyx 42

4

1yx 2

0 ,2 .7

xy 42

pxy 42 2 xy 82

Page 9: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Modeling a Parabolic ReflectorModeling a Parabolic Reflector9. A searchlight reflector is designed so that a cross section through its axis is a parabola and the light source is at the focus. Find the focus if the reflector is 3 feet across at the opening and 1 foot deep.

1 ,5.1

ypx 42 25.1

4

25.2p

p425.2

400

22516

9

1

Page 10: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2Modeling a Parabolic ReflectorModeling a Parabolic Reflector10. One of the largest radio telescopes has a diameter of 250 feet and a focal length of 50 feet. If the cross section of the radio telescope is a parabola, find the depth.

yx 42 pyx 42

50yx 2002

2

250

y2001252

125y200625,15

ft 1.78y

Page 11: Notes Over 10.2 Graphing an Equation of a Parabola Standard Equation of a Parabola (Vertex at Origin) focus directrix.

Notes Over 10.2