Greg made 4 chairs and 3 tables. greg only has enough plywood to make at most 15 chairs or tables total. let x represent the number of more chairs and y represent the number of more tables that greg can make. which of the following graphs best represents the relationship between x and y?

line joining ordered pair 7, 0 and 0, 7 and the region below this line which lies in the first quadrant is shaded

line joining ordered pair 0, 8 and 8, 0 and the region below this line which lies in the first quadrant is shaded

line joining ordered pair 0, 5 and 3.5, 0 and the region below this line which lies in the first quadrant is shaded

line joining ordered pair 0, 2.5 and 1.5, 0 and the region below this line which lies in the first quadrant is shaded

i am trying to figure out what i did wrong on this question. at first i selected answer choice a, it is incorrect. i kinda took a guess. could someone explain to me how to do this?