A136 students are in the cafeteria. the ratio of students buying lunch to those who brought their lunch is 3: 10. how many students brought their lunch?

t hope this

:

sample answer: you can determine whether each element of the domain is paired with exactly one element of the range. for example, if given a graph, you could use the vertical line test; if a vertical line intersects the graph more than once, then the relation that the graph represents is not a function.