A function can be used to model real world situations.
The function for monthly cost is [tex]f(n) = 3.15n[/tex]
From the question, we have:
[tex]Lunch = \$3.15[/tex]
Assume the number of days in a month is n.
The monthly cost will be calculated using:
[tex]f(n) = Lunch \times n[/tex]
Substitute 3.15 for Lunch
[tex]f(n) = 3.15 \times n[/tex]
[tex]f(n) = 3.15n[/tex]
Hence, the function for monthly cost is: [tex]f(n) = 3.15n[/tex]
Read more about functions at:
https://brainly.com/question/12431044
