Side 2 - Cirkel

Ej tak, du har virkelig reddet min matematik aflevering! :-)

1000 tak!

evt.
                                        dy/dx = -(x-2) / (y+3)                    i punktet (-1,-7)

                                        dy/dx = -(-1-2) / (-7+3) = -(3/4)

tangentligning          
                                        y = -(3/4)x + b                              i punktet (-1,-7)

                                        -7 = -(3/4)·(-1) + b
                                         b = -(31/4)

konklusion
                                        y = -(3/4)x - (31/4)