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## Main Question or Discussion Point

if [tex]y\propto x[/tex] at z constant

and [tex]y\propto z[/tex] at x constant

then

[tex]y\propto xz[/tex]

why not

[tex]y^2\propto xz[/tex]

thank you

and [tex]y\propto z[/tex] at x constant

then

[tex]y\propto xz[/tex]

why not

[tex]y^2\propto xz[/tex]

thank you

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