Can someone me with these two, i'm not sure about the first one, i'll appreciate it: )

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

On a piece of paper, graph y< x+1. then determine which answer matches the graph you drew.

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