10-2 Parabolas

1
10-2 Parabolas

• Conic Sections

2
Ex 1
Identify the focus and the directrix.
3
Ex 1
Identify the focus and the directrix.
4 4
4
Ex 1
Graph the function.
5
Ex 1
Does the graph open up, down, left or right?
Since 3 is negative, this graph opens down
6
Ex 2
Does the graph open up, down, left or right?
Get the squared by itself
Since 4 is positive, the graph opens right.
2 2
7
Ex 2
Identify the focus and the directrix.
8
Ex 2
Identify the focus and the directrix.
4 4
9
Ex 2
Graph the function.
10
Ex 3 Write the standard form of the equation of
the parabola with the given focus and vertex at
(0,0).
(-3,0)
Draw a picture!!
 
 
 
11
Ex 4 Write the standard form of the equation of
the parabola with the given directrix and vertex
at (0,0).
y ¼
Draw a picture!!