Respuesta :

Answer:

-5/6

Step-by-step explanation:

18x – 15y = -315

-15y = -18x - 315

y = 6/5x + 21                  <=== slope is 6/5

Perpendicular line has a slope that is opposite inverse. So, 6/5 would become -5/6.

y = -5/6x + 21               <=== perpendicular slope -5/6

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