A school has 825 students and 55 teachers how ,many students are per teacher unit rate

News cameras take an overhead picture of a crowd at an outdoor event journalist then count the total number of people in the picture and use the sample of estimate the total number of people in the crowd this process is an example of

What is the name used to describe a graph where for some value of x, there exists 2 or more different values of y?

How do you determine whether a relationship represented as as graph is linear or nonlinear