A mark or character that is used to illustrate a object, function, or process
D the author's opinions.
The experience, credentials, and education of an author all determine the credibility of the author. Sure his/her opinions may be important to the reader, but overall doesn't make the author trustworthy or not
Answer:
sketch the graph of f(x)=x²-5x+4÷x²+2x-15
I answered this same question remember yhe story about the boy who called wolf