URGENT QUIZ TOMORROW!!!

Can you please help me find the equation to this slope? I got y=1/8x-1 but my friend got -1/8x-1? Please help and explain why its postitive or negative too please.

URGENT QUIZ TOMORROW Can you please help me find the equation to this slope I got y18x1 but my friend got 18x1 Please help and explain why its postitive or nega class=