Question

The equation x² - 4x + y2-2y = 16 describes a circle. What is the y-coordinate of

the center of the circle?

Answer 1

1

Explanation:

→ Complete the square

( x - 2)² - 4 + ( y - 1 )² - 1 = 16

→ Simplify

( x - 2 )² + ( y - 1 )² = 21

→ Find centre

( 2 , 1 )