Ответ:

y=4x

1. y=4×(-3)=-12
2. y=4×(-1,5)=-6
3. y=4×0=0
4. y=4×2=8

y=-2x

1. y=-2×(-3)=6
2. y=-2×(-1,5)=3
3. y=-2×0=0
4. y=-2×2=-4

y=-2x+3

1. y=-2×(-3)+3=9
2. y=-2×(-1,5)+3=6
3. y=-2×0+3=3
4. y=-2×2+3=-1