121 meals / 11 days find the unit rate​

Initially 100 milligrams of a radioactive substance was present. after 6 hours the mass had decreased by 4%. if the rate of decay is proportional to the amount of the substance present at time t, find the amount remaining after 24 hours. (round your answer to one decimal place.)

What term makes it inconsistent y=2x - 4

2. explain in words how you plot the point (4, −2) in a rectangular coordinate system.