Marty ate 4/6 of his pizza and luis ate 5/6 of his pizza. marty ate more pizza than luis. how is that possible?

Well 4/6 is simplified to 2/3. 5/6 cannot be simplified. 
Think of it like this: if you cut 2 pizzas, 1 into 3 equal pieces and then the other pizza into 6 equal pieces. If you were to eat 2 pieces of the 3 you cut from the first pizza, you would be eating more pizza than the second one because in order to get 6 pieces evenly, you have to cut them smaller than you would for 3 pieces.

You would need a laid out graph for this but could you provide a picture of just a graph? i can give stepssolve for y.subtract 4xdivide by -1 (opposites)graph slope intercept formcheck each point to see if it’s on the graph