y=0.25x+3
для x=-4,0,4,8
y=2,3,4,5
y(-4)= 0.25*(-4)+3= -1+3=2
y(0)=0.25*0+3=3
y(4)=0.25*4+3=4
y(8)=0.25*8+3=5
x∈[-4;8]
y(-4)=-4*0,25+3=-1+3=2
y(8)=8*0,25+3=2+3=5
y∈[2;5]
y={2;3;4;5}
y=0.25x+3
для x=-4,0,4,8
y=2,3,4,5
y(-4)= 0.25*(-4)+3= -1+3=2
y(0)=0.25*0+3=3
y(4)=0.25*4+3=4
y(8)=0.25*8+3=5