someone explain how to do this

Answer:
well u would graph the y intercept first witch would be 3y
so u would go to the 3 on the vertical line then you would do the x intercept witch would be 7x so u would graph 7 on the horizontal line
now that is my best guest srry if its wrong but i think its right
So X 7 and Y=3 - Obviously... Anyways when you graph it the slope is -7/3 and the Y-Intercept is -7...
X=0&1
Y=-7&-28/3
(0,-7) and (1,-28/3)