question: There is a piecewise function combind by straight lines going through (3, -2), (1, 0), and (0,1). Write an equation for the graphed function f.
  
query_wo: Please directly answer the question and provide the final value, e.g., 1, 2.5, 300.
  Question: There is a piecewise function combind by straight lines going through (3, -2), (1, 0), and (0,1). Write an equation for the graphed function f.
  
query_cot: Please first conduct reasoning, and then answer the question and provide the final value, e.g., 1, 2.5, 300, at the end.
  Question: There is a piecewise function combind by straight lines going through (3, -2), (1, 0), and (0,1). Write an equation for the graphed function f.
  
question_for_eval: There is a piecewise function combind by straight lines going through (3, -2), (1, 0), and (0,1). Write an equation for the graphed function f.
  