Write the equation of a line that is parallel to 3y+4x=0

Make the variable negative, -3y -4x, then equal them to a number greater/less than 0. so -3y -4x = 1 could work

Since you didn't include the picture, I can give you the description so you know how to pick the correct answer.

The third quartile of a data is always shown in a box plot. In the middle of your graph should be a box. The third quartile is the value that goes with the far right edge of the box.