Question

If the line passing through the points (4, 3) and (2, l) is perpendicular to the line y = 2x + 3, then l is equal to

• A. 4
• B. –4
• C. 1
• D. –1

Answer 1

Answer: (A)

4

Answer 2

Slope (m₁) =$\frac { \lambda - 3 } { - 2 }$; slope (m₂) of line =2;

\ m₁ m₂ = –1 Ž$\frac { \lambda - 3 } { - 2 }$× 2 = –1; l = 4