Answer:
B: Survey 3 randomly selected students from every homeroom.
Step-by-step explanation:
This would be the best way to survey, because all the others have some sort of variable. The principle doesn't know who buys lunch and who doesn't, so why would he just ask kids who ride in a car as there are kids who ride buses, or only 7th grade students, so the best answer would be something that everyone has, like homeroom.
Now, assuming is a vertical parabola, so the squared variable is the "x", let's do some checking.
Answer:
Please find attached pdf
Step-by-step explanation:
Here, it is solved.
you only have to know:
The sum of the sides of a quadrilateral is equal to 360º.