Look at pic to answer ! 20 points given

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)

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

Which statements are true about additional information for proving that the triangles are congruent check all that apply