Algebra write all of the digits that can replace each

What are linear equations? could'ya explain too me, ? ! and how do you see what graph is a proportional relationship?

How do i solve this (-2,6) (4,3) it's a select all correct answers

The diameter on the base of the cone measures8 units. the height measures 6 units. what is the volume of the cone? (24pi cubic units)(32 pi cubic units)(48pi cubic units)(64pi cubic units)