Answer:
[tex]y=\operatorname{\$}\text{53}[/tex]Step-by-step explanation:
This situation is represented by a linear function, remember that a line is represented by the following equation by the slope-intercept form:
[tex]\begin{gathered} y=mx+b \\ where, \\ m=\text{ rate of change or rate per day} \\ b=\text{ initial fee} \end{gathered}[/tex]Therefore, with the given information:
[tex]y=12x+5[/tex]Hence, substitute x=4 to determine the cost of a 4-day rental:
[tex]\begin{gathered} y=12(4)+5 \\ y=\text{ \$53} \end{gathered}[/tex]