### Home > CCA2 > Chapter 8 > Lesson 8.1.2 > Problem 8-42

8-42.

A circle with its center on the line

*y*= 3*x*in the 1^{st}quadrant is tangent to the*y*-axis.*8-42 HW eTool*(Desmos). Homework Help ✎If the radius is 2, what is the equation of the circle?

If the radius is 3, what is the equation of the circle?

What point on the line *y* = 3*x* is 2 units from the *y*-axis?

Use the coordinates of the center and the radius to write an equation in general form.

See part (a).

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