In th fig , d is the mid point of ab and cd is perpendicular to ab. prove abc is congurence to bcd.

   Statement                            Reason

1. CD=DC                        Reflexive Property

2. D-midpoint of AB                Given

3. AD=BD                         Definition of Midpoint

4. CD⊥AB                                  Given

5. m<CDA=m<CDB         Definition of Perpendicular Lines

6. ΔACD≅ΔBCD                           SAS

i believe that the answer is

b. y-1=-2(x-4)

hope this !