Let y vary partly as 1/x and partly as x. When x = 1, y = 5 and when x = 4, y =25/2. Find y when x = 2. A.5/2 B. 4 C.25/4 D. 7 E.17/2
because y is partially proportional to (1/x) and x . k amd m are proportionality constants.
By given conditions.
solving above system of equations in m and k ,we have
m=3 and k=2
when x=2 then
Correct choice for answer is D