4. The generalized vertex form of a quadratic function is shown below for aly-tu? K Which statement describes the symmetry and the equation of the atis of symmetry for
graph of the verter form of quadratic functions?

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