which value is a good estimate of the railroads average elevation?\n450\n480\n500\n550

which value is a good estimate of the railroads average elevation?\n450\n480\n500\n550
Answer
Explanation:
Step1: Observe the contour - lines
The contour - lines on the map show elevation. The railroad is located near the 450 - foot contour - line.
Answer:
450