Which graph best models

Determine the solutions to the following systems of inequalities
I. (4,1)
II. (5,-2)
III. (-3,1)
IX. (1,1)
Find the solution to the system of equations:
2x+y=7
3x-4y=5
The ordered pairs in the sets shown below are of the form (x,y). In which set of ordered pairs is y a function of x?
If
what is f(-4)