.
Y = 1/4x
Y = 1/4x + 3
Y = 3x + 1/4
X = 1/4y + 3
Y = 3x - 1
Y = 3x + 1
Y = -x + 3
Y = -3x + 1
Y = -3x + 11
Y = -3x - 11
Y = -3x + 19
Y = -11x - 3
Y = -4
Y = 4
Y = -4x
Y = 0
C = 12n + 10; $58
C = 10n + 12; $52
C = 12n ; $48
C = 10n; $40
Y - 2 = 3(x - 2)
Y + 2 = -3(x + 2)
Y - 2 = -3(x - 2)
Y = -3x + 8
Y = 4
Y - 4 = 0
Y + 4 = 0
Y + 3 = 0
3x - y = -5
Y = 3x + 5
-3x + y = 5
3x + y = -5
Y = -5x
Y = -5x - 57
Y = -5x - 63
5x + y = - 57
Y = -x - 1
Y = x - 1
Y = x + 1
Y = x - 5
Yes; they are perpendicular because their slopes are 7 and -7 which are negative reciprocals.
No; they are parallel because the slopes are both 7.