Which of these lines is parallel to y=−3x+1y = -3x + 1y=−3x+1?
y=3x+1y = 3x + 1y=3x+1
y=−3x+8y = -3x + 8y=−3x+8
y=13x+1y = \frac{1}{3}x + 1y=31x+1
x=−3x = -3x=−3