How to solve 2t + 9.4 = 39.8

In two or more complete sentences describe how to determine the appropriate model for the set of data, (1,1), (3,2), (6,3), (11,4).

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Which points are solutions to the linear inequality y < 0.5x + 2? check all that apply. (–3, –2) (–2, 1) (–1, –2) (–1, 2) (1, –2) (1, 2)