Question

关于有些单词我已经标号中文了Find the equation（方程） of a line with each of t

Answer 1

1.y=3x-1

parallel => slope=3

y=3x+c

substitute x=0, y=-1 into above equation => c=-1

2.y=-3x+6

perpendicular => slope*1/3=-1 => slope=-3

y=-3x+c

substitute y=0, x=2 into above equation => c=6