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Answer:
B, D
Step-by-step explanation:
(15-0)/(6-0)=15/6=5/3, so A is not correct
(5-15)/(10-6)=-10/4=-5/2, so B is correct
(-2-0)/(0-(-5))=-2/(0+5)=-2/5, so C is not correct
(5-7)/(3-(-2))=-2/(3+2)=-2/5, so D is correct