Let
x--------> the number of miles driven
y--------> the amount in dollars that Daniela paid
we know that
[tex]y=0.15x+22[/tex]
where
[tex]22[/tex] -------> represent the daily flat rate (the y-coordinate of the y-intercept of the linear equation)
[tex]0.15[/tex] -------> represent the cost per mile (the slope of the linear equation)
[tex]x[/tex]---------> number of miles driven