C(x)={0.35 if x ≤8,000 0.75 if 8,000
sketch a graph to model seattle’s cost structure over the domain [0, 42000]. be sure to label the axes and any endpoints where the graph breaks. (5 points)
can you include the break points?

There might be something missing in the given equation. Since C is a function of x, the equation must contain x. For sample purposes, let's just assume the equations are:

C(x) = 0.35x  for x≤8000
C(x) = 0.75x  for x≥8000

The domain is from 0 to 42000. This is the x-axis as shown in the picture. Sample calculations are shown on the left of the graph. The blue graph is for the function C(x) = 0.35x  for x≤8000, while the orange graph is for the functionC(x) = 0.75x  for x≥8000.The graph break is located when x = 8000. 

Ithink it would be 160 people

It is 5.8 you add all of the up to equat 180 then solve the equation