What is the y intercept of the function f(x)= -2\9x+1/3?

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?

Which statements about these triangles is true

Asphere has a diameter of 10 in. what is the volume of the sphere?