Question

Consider four straight lines

(i) l₁ : 3y = 4x + 5

(ii) l₂ : 4y = 3x – 1

(iii) l₃ : 4y = 3x = 7

(iv) l₄ : 4x + 3y = 2

Which of the following statement is true ?

(1) l₁ and l₂ are perpendicular

(2) l₁ and l₄ are parallel

(3) l₂ and l₄ are perpendicular

(4) l₂ and l₃ are parallel

Answer 1

(3) l₂ and l₄ are perpendicular

l1 : 4x - 3y + 5 = 0	m1 = -4/-3
l2 : 3x - 4y - 1 = 0	m2 = -3/-4
l3 : 3x + 4y - 7 = 0	m3 = -3/4
l4 : 4x + 3y - 2 = 0	m4 = -4/3