Off topic: how to analyze each of the genes in a dataset, looking for a positive or negative linear correlation of that gene with the SALL4 gene expression, such that the slope m of the line is between +2 to +5

Question

[tuancragmere]

I would like to know how to analyze each of the genes in a dataset, looking for a positive or negative linear correlation of that gene with the SALL4 gene expression, such that the slope m of the line is between +3 to +10 and between -3 to -10.

This would compare the linear positive relationship between the SALL4 genes among the 154 samples, with each of the remaining the genes in the dataset (about 22000).

Any help is greatly appreciated.