Can you guys help me finish this quiz tonight

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)

How do i do this activity, is appreciated

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)