For this case we want to find a function of the form

Where:
s: Represents the number of seconds
d: Represents the number of days
So:
By definition we know that 1 hour has 3600 seconds, to know the amount of seconds in a day, we make a rule of three:
1h ------------> 3600s
24h ----------> x
Where "x" represents the number of seconds in a day.

So, in one day there are 86400 seconds.
Then, the function is as follows:

Answer:
