This is another close reading question (like #9)
The top inequality in each answer — should it include 50?  or not?
Should r be more than 10 or less than 10?
Should g include 12 or not?

This is actual a close reading question.  The questions to ask yourself are:
D and Q together are how many coins?
How much is D worth and how much is Q worth?

If a point aka ordered pair is a solution, it will appear on the table as the (x,y) will make the equation true.
Check all the “easy” x values that are integers (x = 0, x = 5, x = -1) — which y value in the answer choice does not match that of the table?

Look at where the graph crosses the x axis…then check those x values by seeing that the y value is 0 on the table.  Students can also prove their answer by substituting the x values into the equation to see if the result is 0.