# What is the name of the prediction method?

Suppose, I have a data set:

ix    m_t1   m_t2
1     42     84
2     12     12
3     100    50


then, we can calculate the difference between m_t1 and m_t2 in %

like

diff
100
0
-50


I would like to apply this difference on m_t2 to get m_t3_predicted

m_t3_predicted
168
12
25


https://stackoverflow.com/questions/56098067/naive-prediction-using-pandas