10 Which of these four lines are perpendicular.

y - 9 = 3 (x + 1)

y = - x + 5

y = 4x + 3

4y + 8x = 12

Answer: Line 1, 2 and 3

y-9 = 3 (x+1)

y = - x + 5

y = 4x + 3

Step-by-step explanation:

Follow the equation of a perpendicular line; y = mx + b

The first three lines conform to the equation above

Line 1 : y-9 = 3 (x+1)

y-9 = 3x+3

y = 3x+3+9

y = 3x + 12

This equation shows that line one conforms to the perpendicular equation