Question

If y varies directly as x, find the constant of variation if y = 25 and x = 5.
Answer

5

125

-5

-125

Answer 1

y varies directly as x
now let the constant of variation is=K
so u can write
\[y=Kx~~so\\K=\frac{ y }{ x }\\now~y=25,x=5\\K=25/5=5\]