y equals 4x+1 is a parallel line to y equals 4x.
4x = y : or it can be written in the reverse order, y = 4x.
2
-3
8 + y = 4x8 + y - 4x = 4x - 4x 8 + y - 4x = 0 8 - 4x + y = 0
y = 4x-3
y=4
y= -4x-7 y=3x 3x= -4x-7 3x+4x=7 7x=7 x=1
Parallel. They both have a slope of 4.
y equals 2
-3
The domain of y = -4x is all real numbers.