ARG 5.1 study the table below and answer the following questions. X21 0 53 12 -1 -3 Write down the general formular of the straight line(linear) graph. in=-ǝ+7 5.2 Determine the gradient of the values on the table. (1) (4) 5.2 Calculate the constant value (c) (3) 5.3 The graph represented by the table above is it an increasing or decreasing graph? (1) 5.4 Give reasons for your answer in QUESTION 5.3. (2)​