If you measured the distances and recessional velocities for a sample of galaxies and plotted the data to get the figure below,what value would you derive for the Hubble constant? 
A) 10 km/s/Mly
B) 22 km/s/Mly
C) 45 km/s/Mly
D) 100 km/s/Mly
Correct Answer:
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