It's for a big test
laura & mary are doing their homework together.
mary thinks the relation {(1, 1), (1, 3), (2, 3), (3, 4)} is a function, but laura doesn’t think it is.
who is correct and why?

which ordered pairs are solutions for this function? {(0, -4), (1, -2), (5, 6), (6, 5)}

{(-4, 0), (0, 2), (1, 2), (4, 4)}

{(-3, 1), (0, -4), (2, 3), (3, 2)}

{(0, -4), (1, -2), (2, 0), (4, 4)}

Laura would be correct because if there are 2 x values in the sets of coordinates, it is not a function. The ordered pairs would be {(0,4),(1,-2),(2,0),(4,4)}

In all honesty, there really is no “work” per say to show. mainly it’s just using the process of elimination. the question is asking which domain(s) would be the most appropriate for the function c(n). n is the number of observed vehicles so right away, 1, 2, and 3 can be eliminated.why? 1, 2 start in the negatives and therefore it is impossible to observe negative cars. so, #4 would be the best answer to the given problem.