Question

LAS CON
CLASS - VIII
CHAPTER-8: DIRECT AND INVERSE VARIATION
ASSIGNMENT QUESTIONS
Q.1 Choose correct options:-
i) if 'X' and 'y' are in a direct proportion then which of the following is correct
a) x - y = constant
b) x + y = constant
= constant
c) x x y = constant
d) y
ii) If 'x' and 'y are in an inverse variation then which of the following is com​

Answer 1

Answer:

By definition of proportionality,

If y is directly proportional to x,

y α x

∴y=Kx .......Equation 1

where K is constant of proprtionality

Now,

Given that x=2,y=4

putting the above values in Equation 1 we get,

4=K×2

∴K=2