Uhhh... I think it’s D but that could be wrong
The one on the top should be a right triangle and the bottom one is not
Basically all you have to do is plug in numbers for Y and C. the formula is (y,x) so use numbers like (1,3) and as long as it fits in the equation (the equation ends up true. like in this case (1 < 2) which means it worked) you can graph that point.
