dua itu dong pake cara:) yg kamu bisa aja jg gpp kok hehe

17) x=4 mk f(4)=-4+4=0
x=5 mk f(5)=-5+4=-1
x=6 mk f(6)=-6+4=-2
x=7 mk f(7)=-7+4=-3
Range={-3,-2,-1,0}

18) jika A, B dan C segaris mk
mAB=mBC
(yB-yA)/(xB-xA) = (yC-yB)/(xC-xB)
(11-2)/(2+1)=(m-11)/(-3-2)
3=(m-11)/(-5)
-15=m-11
m=-4