For x > 0, which answer best describes the curve of the function f(x) = x ? Positive values of f(x); steep near 0, but flattening as x approaches Negative values of f(x); steep near 0, but flattening as x approaches Positive values of f(x); flat near 0, but steepening as x approaches Negative values of f(x); flat near 0, but steepening as x approaches None of the above