What does the point (0,0) mean

How can you tell when x and y are not directly proportional?

What is the point slope form of a line with slope -5 that contains point (2,-1)

David is standing on the sixth rung of a ladder while painting his house. which expressions represent a change in david’s position of 2 rungs on the ladder? choose exactly two answers that are correct. a. 6+2 b. 6-2 c. 2x6 d. 6/2