Help for abunch of points.

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?

Alex's monthly take home pay is $2,500. what is the maximum bad debt payment he can maintain without being in credit overload?

The function f(x)= -(x+5)(x+1) is down. what is the range of the function?