is this the correct method to interpolate?

Associate
Associate
Joined
26 Jun 2016
Posts
293
lets say
A B
7 50
8
9
10
11 70


Is this the correct method to interpolate, to find 8 when I don't have the data between 11 and 7 and I want to build it up a table of data.

=(70-50)/(11-7 )*(8-7)+50=
 
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