Answer:
(x -5)² +(y -1)² = 25
Step-by-step explanation:
The equation for a circle centered at (h, k) with radius r is ...
(x -h)² +(y -k)² = r²
Here, the radius is equal to the x-coordinate of the center, since you want the circle tangent to the y-axis. That means (h, k) = (5, 1) and r = 5. The equation you want is ...
(x -5)² +(y -1)² = 25
