Respuesta :

Answer:

0

Step-by-step explanation:

It is a horizontal line.

wegnerkolmp2741o

Answer:

undefined

Step-by-step explanation:

The slope of a line is found by

m = (y2-y1)/(x2-x1)

   = (-9 -10)/(-9 - -9)

   = -19/ (-9+9)

   = -19/0

We cannot divide by zero so the slope is undefined

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