Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Bidyut sinha
check my second picture that I have sent to you for clarification..there I have explained that if you consider a general equation of ELECTRIC FIELD such as E= Ex i cap+Ey j cap...there I have compared this with the Equation of straight line...there you will get slope like things dy/dx=-y/2x... that's it... for more detail check second picture... :)..