Question 1166757
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<pre>

Horizontal compression of 1/3 is the same as horizontal stretching with coefficient 3.


    y = {{{x/3 - 3}}}.


You multiply  "x"  by  {{{1/3}}}.


That is all what you do.
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The general rule is that the plot  &nbsp;y = f(kx)  &nbsp;is the horizontal compression with the coefficient &nbsp;"k"  &nbsp;of the plot &nbsp;y = f(x),


for any positive real coefficient "k".