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jika x=0 maka y=4(0)-1
y=-1
jadi (x,y)=(0,-1)
jika y=3 maka x=
3=4x-1
3+1=4x-1+1
4=4x
1=x
jadi (x,y)=(1,3)
nanti digambar sendiri ya
1e. y=-2x-3
jika x=0 maka y?
y=-2(0)-3
y=-3
jadi (x,y)=(0,-3)
jika y=1 maka x?
1=-2x-3
1+3=-2x-3+3
4=-2x
-4=2x
-2=x
jadi(x,y)=(-2,1)
1f. y=-2/3x+2
jika x=0 maka y=
y=-2/3(0)+2
y=2
jadi (x,y)=(0,2)
jika y=4 x=
4=-2/3x+2
4-2=-2/3x+2-2
2=-2/3x
2:-2/3=x
x=2x-3/2
x=-3
jadi(x,y)=(-3,4)