Graph D matches this situation.
Given that
There are 8 milligrams of a radioactive substance in a lab in month 1.
Each month, half of the radioactive substance loses its radioactivity.
We have to determine
Which graph matches this situation?
According to the question
When a radioactive substance loses its radioactivity, a reduction in its amount represents exponential sequence and the graph represents the exponential graph.
So graph number 1 is invalid which is representing a linear graph.
Now the amount of the radioactive substance is 8 milligrams in month 1. So the point on the graph should be (8, 1).
After 1 month it reduces to half 3 milligrams in 2nd month and the point will be (3, 2).
Similarly, after the 3rd and 4th-month points will be (1.5, 3) and (0.75, 4).
These points have been plotted in graph number D only.
Therefore Graph D is the answer.
To know more about Graphs click the link given below.
https://brainly.com/question/3799426
