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Mathematics 24 Online
OpenStudy (anonymous):

if y varies directly as x, and y = 2 when x = 4, what is the value of y when x = 12?

OpenStudy (unklerhaukus):

\[y(x)\propto x\\\qquad\Downarrow\\ y(x)=kx\\ y(4)=4k=2\\k=?\\ \quad\\ y(12)=12k=??\\\]

OpenStudy (unklerhaukus):

do you understand what i have wrote @OtakuLife478

OpenStudy (nincompoop):

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