1. Converting to Standard Form of an ellipse
How do I convert to standard form so that I can graph an ellipse? What are the steps involved?

2. Review: What is standard form?
Horizontal Ellipse OR
Vertical Ellipse

3. Lets Do it! Graph the ellipse given by Step 1:
Group x and y terms together and add 39 to both sides
Step 2:
Factor out the common factor, 4 is common factor to the x terms and 25 is common factor to the y terms
Step 3:
Complete the square of x and y. (b/2)². Multiply (b/2)² by the coefficients and add to the other side.

4. Continuation of example 1
Step 4: Simplify; condense into perfect squares and add the right side Step 5: Divide by 100 to get the right side of your equation equal to 1.
25>4 , therefore the ellipse is horizontal
a= b= (h,k) = (-3,1)
Since a=5 , the vertices are 5 units to the left and right of the center, major axis vertices=(-8,1) and (2,1)
Since b=2, the vertices are 2 units up and down from the center, minor axis vertices =(-3,-1) and (-3,3)

5. Example 2
Convert to Standard Form and Graph

6. Example 2