Blood alchohal concentrations of drivers

Which equation represents a proportional relationship that has a constant of proportionality equal to 1/5

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?

Factor -8x3-2x2-12x-3 by grouping what is the resulting expression?