by calculating the gradients of the following pairs of lines, state whether they are parallel, perpendicular or neither

Question

1. y = -4

x = 2

2. y = 3x

x = 3y

3. 2x + y = 1

x - 2y = 1

4. y = 2x + 3

4x - y + 1 = 0

5. 3x - y + 2 = 0

3x + y = 0

Answer 1

1) perpendicular 1st is horizontal 2nd is vertical

2) neither. with one sign change they would have been perpndicular

3) perpendicular

4) neither

5) neither