Question

The equations of four lines are given. Identfy which lines are parallel. Line 1: y = -9x + 6 Line 2: x + (1/3)y = -6 Line 3: y = -3x - 8 Line 4: y + 7 = (-1/9)(x + 4)

Answer 1

line 2 and line 3

Explanation:

line1=y=-9x+6. gradient 1= -9

line2=x+⅓y=-6

⅓y=-6-x. gradient2= -3

y=-18-3x

line3=y=-3x-8. gradient3= -3

line4=y+7=-1/9x-4/9

y=-1/9x-4/9-7. gradient4= -1/9

y=-1/9x-7⁴/9

parallel lines have the same gradient