If you want to calculate   X with v given take option X:
If you want to calculate   v with X given take option v:
Type your entries after the colon(ie :) : 
Problem type ( X or v): X
Value of X if v  or v0 if X: 0.0174
Height of the column:2
No of data points:8
Time Conc:
0 300
60 189
80 180
100 168
130 156
200 111
240 78
420 27



x 0.0174 2 8

