This is similar to Problem 2 from your 2.8 worksheet.
1.) Are the lines below perpendicular, parallel, or neither?
$$y = 4 x - 3 \qquad y = -\frac{1}{4} x + 6$$

A. Perpendicular
B. Parallel
C. Neither

2.) Are the lines below perpendicular, parallel, or neither?
$$y = 4 x + 9 \qquad y = \frac{1}{4} x - 8$$

A. Perpendicular
B. Parallel
C. Neither