Due at 2:30! Help me pls?

In two or more complete sentences, determine the appropriate model for the given data and explain how you made your decision. (1,-1), (2,0.5), (5,1.5), (8,2)

Calculate the missing value. round the answer to on decimal place. start with 70, increase it by 21%, and end up with

Solve 17= -13 - 8x and show your work.