Which pairs make the equation x-9y=12 true

the pairs are
(12,0)
(0,12)
(3,-1)
(0,-4/3)

(note i put the graph in so plz )the graph shows the amount of water that remains in a barrel after it begins to leak. the variable x represents the number of days that have passed since the barrel was filled, and y represents the number of gallons of water that remain in the barrel. what is the slope of the line

The center of the circumscribed circle lies on line segment and the longest side of the triangle is equal to the of the circle.

Find the value of x. give reasons to justify your solutions! c ∈ ae