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how to determine the circle equation?
determine the equation with the center at (-3,5) and tangent to the y-axis
please show steps
2 Answers
- 1 decade agoFavorite Answer
First, you plot the center on a graph. Because it's tangent to the y-axis, it means that however far away that point is from the y-axis is the radius.
From there, remember that the circle equation is (x-h)^2 + (y-k)^2 = r^2 ... (h,k) being the center. (^2 = squared)
Hope I helped :D
- 1 decade ago
If it's tangent to the y-axis, then the radius must be 3 units
(x + 3)^2 + (y - 5)^2 = 9
