If x is directly proportional to y then which of the following is corr

1.	If x is directly proportional to y then which of the following is correct ? A) x ∝ 1/yB) xy = 1/kC) x/y = k D) x = y
Answer» Correct option is (C) x/y = k \(x\propto y\) \(\Rightarrow\) x = ky \(\Rightarrow\) \(\frac{x}{y}=k\) Alternate :- If x is directly proportional to y then the ratio of x and y must be constant. i.e., \(\frac{x}{y}=k\) Correct option is C) x/y = k

If x is directly proportional to y then which of the following is correct ? A) x ∝ 1/yB) xy = 1/kC) x/y = k D) x = y

Answer»

Correct option is (C) x/y = k

\(x\propto y\)

\(\Rightarrow\) x = ky

\(\Rightarrow\) \(\frac{x}{y}=k\)

Alternate :- If x is directly proportional to y then the ratio of x and y must be constant.

i.e., \(\frac{x}{y}=k\)

Correct option is C) x/y = k