Explain whether each following example is proportional or non-proportional. Please sate whether it is proportional or non-proportional AND explain how you know. Part A: Is this equation proportional or non-proportional? How do you know? y = 7x - 3 Part B: Is the graph below proportional or non-proportional? How do you know? Part C: Is this situation proportional or non-proportional? How do you know? A gallon of milk costs $1.99. A half-gallon of milk costs $3.89. Part D: Is the data in the table below proportional or non-proportional? How do you know? PLEASE SHOW WORK. Thank you.

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