



 
Warren, A linear function is one that can be written in the form Ax + By = C where A, B and C are any real numbers. The term linear comes from the fact that its graph is a straight line. The graph of y = √(3x + 1) is not a straight line y = √(3x + 1) and hence the expression y = √(3x + 1) can not be written in the standard form Ax + By = C where A, B and C are real numbers. Penny  


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