The value of a is 30 when b = 5.
Direct Variation is when a variable varies directly with another variable.
It is given that
a ∝ b
a= kb
where k is the proportionality constant
a = 18 when b = 3
18 = k * 3
k = 6
Therefore from the equation , value of a can be obtained
for b = 5
a = 6 * 5
a = 30
Therefore the value of a is 30 when b = 5.
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