For this case we can raise a rule of three based on Anthony trotting [tex]11 \frac {1} {2}[/tex] miles in 23 minutes.
[tex]11 \frac {1} {2} = \frac {2 * 11 + 1} {2} = \frac {23} {2}[/tex]
[tex]\frac {23} {2}[/tex] miles -----------> 23 minutes
x ----------------------------------------> 1minute
[tex]x = \frac {\frac {23} {2} * 1} {23}\\x = \frac {\frac {23} {2}} {23}\\x = \frac {23} {2 * 23}\\x = \frac {1} {2}[/tex]
ANswer:
0.5 miles per minute
