Question 1)
y = -2x + 5
Slope = -2
y = 2x-3
Slope = 2
Answer: The slopes are neither parallel nor perpendicular
Question 2)
3x - 8y = -16
8y = 3x + 16
y = 3/8x + 2
Slope = 3/8
32x + 12y = -18
12y = -32x - 18
y = -8/3x - 3/2
Slope = -8/3
Answer: The slopes are perpendicular