You can determine that the graph of 4x - 15y = 13 will pass through the coordinate point by plugging the ordered pair into the equation. If the equation makes sense, then the graph does pass through that point.
So, using the x and y values you found in C:
4(7) - 15(1) = 13
28 - 15 = 13
13 = 13
The coordinate point does fall on the graph
