Write the Word or Phrase That Best Completes Each Statement $y = x ^ { 3 }$

Short Answer

Write the word or phrase that best completes each statement or answers the question.
Provide the missing information.
-The function defined by $y = x ^ { 3 }$ (is/is not) an exponential function, whereas the function defined by $y$ $= 3 ^ { x }$ (is/is not) an exponential function.