If varies directly as and 9 when 6 find when 12 - JSS3 Mathematics Variations Question
If 𝑦 varies directly as 𝑥 and 𝑦=9 when 𝑥=6, find 𝑦 when 𝑥=12.
Given 𝑦=𝑘𝑥, substituting the given values:
9=𝑘⋅6
Solving for 𝑘:
𝑘=9/6=1.5
Now, find 𝑦 when
x=12:
𝑦=1.5⋅12=18
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