18. Given the following four lines, pick the true statement.
Line 1:
Line 2:
Line 3:
3y = 4x + 3
4y = 3x - 4 3x + 4y = 8
Line 4:
4x + 3y = -6
O
A. Lines 1 and 4 are parallel
B. Lines 2 and 3 are parallel
C. Lines 2 and 4 are perpendicular
D. Lines 1 and 2 are perpendicular
