Practice!

Sample Problem

Which of the following graphs accurately represents (x-1)2+y2>9?

 

Solution

(x-1)2+y2=9 is the equation of a circle with a radius 3 and centered at (1, 0)

The (x-1)2+y2>9 means that every point outside this circle with radius 3 and centered at (1, 0) should be shaded. (greater than 9)