Respuesta :

Yang100

Answer:

8

Step-by-step explanation:

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

3/4=(-1-(-4))/(k-4)

3/4=(-1+4)/(k-4)

3/4=3/(k-4)

cross product

4*3=3(k-4)

12=3(k-4)

12/3=k-4

4=k-4

k=4+4

k=8