Help please I need help

In two or more complete sentences, formulate how to use technology to calculate the appropriate regression model for the given data. you are not required to find the model, just choose the appropriate regression and explain how to use the technology. (-5,,2.,0.8), (0,-0.5), (2,-1.3), (3,-0.8), (5,2)

I’m stuck on this equation, anyone got the answer?

If private savings 'v' = 0.75s and total savings 's' equals $4.20 billion, solve for public and private savings.