Answer:
○ [tex]\displaystyle f^{-1}(x) = \frac{1}{5}x[/tex]
Step-by-step explanation:
You are dealing with direct variation [tex]\displaystyle [f(x) = mx],[/tex] which means you take the multiplicative inverse of [tex]\displaystyle 5[/tex] and insert [tex]\displaystyle x[/tex] next to it, giving you the above function.
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