B
Step-by-step explanation:
y=mx+b
y=-x (y=-1x+0)
b=0
m=rise/run=-1/1
step-by-step explanation:
answers available in this download
(pearson%2c%25202012)%2520bbs.pdf& usg=aovvaw1obmtxnfghfgxhx0urh_je