( HELP ASAP ) Consider the sequence whose first five terms are shown. -59 ,-67 ,-65 ,-53 ,-31

The first term is (blank) To calculate the second term, add (blank) To calculate each additional term, increase the amount added by (blank)

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