### Home > CALC > Chapter 9 > Lesson 9.4.3 > Problem 9-139

9-139.

The graph below is called a "limaçon." Use your conclusions from problem 9-130 to find its equation. Homework Help ✎

*r* = *a* + *b*sin(*θ*)

Notice that the points (2, 0) and (6, *π*/2) are on the graph.

Use these points and substitution to solve for the values of *a* and *b*.