Y varies inversely with x. y=15 when x=10, find y when x=5

Y
=
25
Explanation:
y
=
k
x
;where
x
and
y
are variables and
k
is constant
or
5
=
k
10

or
k
=
5
(
10
)

or
k
=
50

So Equation becomes
y
=
50
x

When
x
=
2

y
=
50
2

or
y
=
25