For the equation -4y=8x, what is the constant of variation?

Afudge recipe calls for 1/2 cup of cocoa if only 1/2 of the recipe is made to how much cocoa should you use

What is the graph of the absolute value equation ? y=|x|-5

Aclassroom is made up of 11 boys and 14 girls. the teacher has four main classroom responsibilities that she wants to hand out to four different students (one for each of the four students). if the teacher chooses 4 of the students at random, then what is the probability that the four students chosen to complete the responsibilities will be all boys?