The difference in the x-coordinates of two points is 3, and the difference in the y-coordinates of the two points is 6. what is the slope of the line that passes through the points?
2
3
6
9

Slope = difference in y / difference in x
slope = 6/3 = 2 <===

The answer is 1 because you have to flip the sign when dividing by negative number and 3

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.