Iam a solid figure with two congruent polygons that are bases connected with lateral faces that are rectangles

Abby is preparing fruit punch for her party. she starts with a bowl filled with liquid that has 1/2 fruit juice and 1/2 sprite, but she decides it's too fruity. so she pours out 1/4 of the liquid, and then fills the bowl up again with sprite. what fraction of the punch is now sprite?

Triangle xyz has vertices x(1,3), y(0,0)

Which of the functions below could have created this graph?