Which of these is an exponential function?

How to determine whether two known pairs of points are on the same line.

Which approach to the theory-and-research cycle does the following sequence reflect: (1) specific observations suggest generalizations, (2) generalizations produce a tentative theory, (3) the theory is tested through the formation of hypotheses, and (4) hypotheses may provide suggestions for additional observations?

What is the measure of angle tvu shown in the diagram below