6. At the right is a cumulative relative frequency graph for the amount spent on a sibling's birthday
present for a group 80 people.
a) Estimate the median and interquartile range of
the amount of money spent on a gift. Draw lines
on the graph to show how you arrived at your answer.
Show work.

Select the correct answer. what was edwin hubble's contribution to the field of astronomy? a. he discovered variable stars. b. he proved that the heliocentric model accurately described our solar system. c. he found a relationship between the period luminosity and distance of stars. d. he proved that the universe is finite. e. he discovered that the universe was expanding.