A meeting room is available for rent. Last month, four groups held meetings there. The number of members per group and the per-member cost for each group is shown below. Number of Members in the Group (x) Per-Member Cost for the Meeting Room (y)
10 6
15 4
20 3
30 2
Which function equation would represent this situation?

y = x/60
y = 60/x
y = x + 60
y = x – 60

The weight of a radioactive isotope was 96 grams at the start of an experiment. after one hour, the weight of the isotope was half of its initial weight. after two hours, the weight of the isotope was half of its weight the previous hour. if this pattern continues, which of the following graphs represents the weight of the radioactive isotope over time? a. graph w b. graph x c. graph y d. graph z