Just do rise over run put the numbers in the blank boxes
I believe it would be any number that is within the darkest shaded area. (-4,1) seems like it would be correct.
ANSWER: y=9
First substitute x
6.4(3)+2.8y=44.4
19.2+2.8y=44.4
subtract 19.2 from both sides
2.8y=25.2
divide by 2.8 on both sides
y=9
184.875 or in improper fraction form 1479/8