The equation is .
Rewrite the equation is .
Since the standard form of linear function is .
The expression includes square root the variable.
Thus, the function is not a linear function.
No.
The function is not a linear function.
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. is not a linear function.![\"\"](\"http://www.mathskey.com/userfiles/image/steps_images/solution.JPG\")
is not a linear function.