ARITHMETIC
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proportional
A variable
a
is said to be
directly proportional
to
b
if
a
/
b
is a constant. The relationship is written
a
b
, which implies that
a
=
kb
, where
k
is a constant. If
a
is
inversely proportional
to
b
, this is written
a
1/
b
.
Related category
ARITHMETIC
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