PLS help me, i due today, ill gve brainliest and 40 points. thay are easy questions, pls help

Which graph represents an even function?

Orly uses 2 cups of raisins for every 12 cups of trail mix she makes. how many cups of trail mix will she make if she uses 8 cups of raisins?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]