You are constructing triangle abc given the line segmentsab and ac and ∠a. the first thing you do is copy segment ac. next, you copy angle a using a on the segment ac as the vertex. the, you copy ab. what is your final step?

Create you're BC segment to create a triangle

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.