141쪽:y=3x-1 y=-x-4,y=5분의2x 3,y=-3분의4x 7 -3,-2,2,4,-3x 4 y=4x-2,y=6x 7,y=-2x-2,y=-2분의1x 5,y=5분의2x-1/142쪽:y=-3x-1 y=3분의2x 5 y=4분의3x-1 y=-2x 7 y=-2분의1x 1 y=-3x 5/143쪽:2,2,-1,2x-1 -2,-2,2,-2x 2 2분의1,2분의1,-2분의1,2분의1x-2분의1 y=-2x 4 y=5x 5 y=-3분의1x 3 y=x 4/144쪽:-4 5 5 y=5분의3x-3 y=2분의1x 2 y=-2x 4/145쪽:2 y=-2분의x 3 y=3분의2x 6 2 1 (2분의3,0) y=3분의2x 2 5/146쪽:2,50-2x 40,40 25,25 6x,25-6x 7,7 5,5/147쪽:16cm 500분 20L y=20-2x y=16-2x y=48-2x/148쪽:4 2 1 5 20초후 2 5 312/149~152쪽:2 2 5 1 6 2 3 4 4 3 8 4 5 1 4 5 3 ab>0 5 제2사분면 2 9 1 y=-2분의1x 2 -14 3분의2 3 5 5 2 3초후 입니다 감사합니다