For the following question, consider the following set of data Number of clients Vehicles needed 2 3 3 5 4 8 5 11 5 16 18 And calculate the regressions line y = ax + b (equation 1), and y = ex + fx + 9 (equation 2). Indicate the value of e: _ __ Insert your answer with two decimal places. For instance, insert 3.14 if you reached the value 3.1415, or 3.15 if you reached the value 3.1463