Step-by-step explanation:
After one day, 2*7=14 people will have received the email.
After 2 days, 2*2*7=28 people will have received the email.
After 3 days, 2*2*2*7=56 people will have received the email.
In general, after n days,
[tex] {2}^{n} \times 7[/tex]
people will have received the email.
So we can say that this is an example of an exponential function
