In this power-law functions worksheet, students solve 3 problems using data from the Wide-field Infrared Survey Experiment in the constellation Carina. Students use a photograph to determine the number of stars as bright as the brightest star in the given field of view, they calculate the number of stars with a given magnitude in a field the size of the moon and they use integration to find the total number of stars that could be detected in a field equal to a WISE survey area.