Question

Dambrary charges a ma retum fe of $3.50 plus 5015 per day that a a wine an equation to mind the total long tower for any number of days a. Make a table to find the total foolt a book 10.15. 20. or 25 days late, Thuan grupin the ordered puuris. DO 2010 SS 20 25 30 Leerweg

Answer 1

Data:

late return fee: $3.50 + $0.15 per day

d=number of days

The equation to find the total fee f for any number of days d is:

`f(d)=0.15d+3.50`

To find the data in the table you use the given number of days and substitute the d in the equation above, as follow:

10 days:

`\begin{gathered} f(10)=0.15(10)+3.50 \\ f(10)=1.5+3.50 \\ f(10)=5 \end{gathered}`

15 days:

`\begin{gathered} f(15)=0.15(15)+3.50 \\ f(15)=2.25+3.50 \\ f(15)=5.75 \end{gathered}`

20 days:

`\begin{gathered} f(20)=0.15(20)+3.50 \\ f(20)=3+3.50 \\ f(20)=6.50 \end{gathered}`

25 days:

`\begin{gathered} f(25)=0.15(25)+3.50 \\ f(25)=3.75+3.50 \\ f(25)=7.25 \end{gathered}`

Then, the table is:

And the graph is:

You use the data in the table whit d in x-axis and f(d) in y-axis: