Can someone answer this

give an example of a line with undefined slope and one with zero slope.
what is the difference if you were to plot your equations.

Each person in an it department of 25 people works on at least one of 3 major projects: system security, program implementation, platform development. 10 people work on system security, 13 work on program implementation, and 12 work on platform development. 4 people work on system security and platform development, 5 people work on program implementation and platform development, and 2 people work on all three projects. how many people work on system security and program implementation?

Which equation expression the relationship between the number of boxes b and the number of cans c and the proportion is 48

Which statement explains the relationship between corresponding terms in the table?