Question

The differential equation of all straight lines passing through the point (1,-1)is

[MP PET 1994]

• A.
  
• B.
  
• C.
  
• D.
  

Answer 1

The correct option is D

Since the equation of line passing through (1.-1) is y + 1 = m(x - 1)
$\Rightarrow y+1=\frac{dy}{dx}(x-1)\Rightarrow y=(x-1)\frac{dy}{dx}-1.$