The following data are available for output (Q) and Long Run Total Cost (LTC) for a firm. Using appropriate calculations determine the range of outputs over which the firm’s technology exhibits Increasing, Decreasing or Constant Returns to Scale.

Q LTC

1 33

2 54

3 75

4 100

5 150

6 228

7 350

I trying to study for an exam and I've been at this problem for hours. I just don't get it. can anyone answer this one for me.

thanks in advance