22 a.

Did you know that the equation represents a circle in the Cartesian plane? Specifically, this circle is centered at the point (1, 0) with a radius of 2. So if you visualize it, you’ll find that it touches the x-axis at (-1, 0) and (3, 0), and reaches up to (1, 2) and down to (1, -2).

When graphing this circle, a common misstep is neglecting the center and radius, leading to incorrect placement and dimensions. Double-check that you’re correctly identifying the center as (1, 0) and measuring the radius outwards 2 units in all directions. It’s a great idea to sketch points that satisfy the equation to ensure you capture the full roundness of your circle!