Question

Y

is inversely proportional to
x
.
When
y
=
10
,
x
=
2

Work out
x
when
y
=
5

Answer 1

x = 4 when y = 5

Explanation:

y is inversely proportional to x mean,

y = k/x

where k is a constant.

y = 10, x = 2

y = k/x

k = y * x

= 10 x 2

k = 20

y = 5, x = ?

y = k/x

x = k/y

= 20/5

x = 4