Classify the critical point with proper justification. The critical point is a saddle point because the determinant at this point is [Select] [Select] [Select] <0 >0 and R, at this point is

The profit P Cin thousands of $) for a company in tems of the amount,8, spent 2. Cin thocusands of $) can be modeled by P= -45+ 485 845+S00 advertising Find the point of diminishing returns. on

Do you use x-coordinates or y-coordinates when describing where functions increase, decrease, or are constant?

Help me filling the blank spot???