Answer
True, $f(x)=10x-20$ is a possible function since $f(7)=50$.
Work Step by Step
Note that when x=7,
$\\\\f(x)=10x-20
\\\\f(7)=10(7)-20=50$
Thus, $f(x)=10x-20$ is a possible function since $f(7)=50$.
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