Identifier: Slope Fields
The main identifier is that the language of the problem will flat out use the term “slope field”. They will either ask you to sketch the slope field, are find the slope field that matches a given differential equation.
You will also usually see an standard x–y axis with dots at all of the whole number ( x , y ) points (i.e., (1,0) or (2,1)), or a graph with a bunch of small lines at all the whole number points.