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6 
Circles
Sketching basic circles in the form x^{2} + y^{2} = C Remember to define the Domain if you write the equation for part of a circle graph. eg 3 ≤ x ≤9 
Ex11.04, Ex11.05 
p48, 
How are x and y related? 
Changing
the radius
Mouseover the equations to see the graph translation 


Adding a
constant to y vertically translates the circle graph
Mouseover the equations to see the graph translation 


Adding a
constant to x horizontally translates the circle graph
Mouseover the equations to see the graph translation 


Horizontal
and vertical shifts can be combined
Mouseover the equations to see the graph translation 

