Hi,

I have a table of values, and I need to determine the relationship between the values. Here is a sample from the table:

Temp Pressure
32 0.0886
35 0.0999
40 0.1217
45 0.1475

I need to use the LOOKUP function to look up pressure values in this table, but I run into the problem where I have a temperature of, for example, 34 degrees. I need the actual pressure for that temperature. Is there a formula I can use to calculate what that would be? Is there a way to calculate the relationship between a set of values?