For this case we have the dog ran [tex]\frac {3} {4}[/tex]mile in [tex]\frac {1} {4}[/tex] of an hour.
Then, we must find the unit rate, for this we divide:
[tex]\frac { \frac {3} {4}} {\frac {1} {4}} = \frac {4 * 3} {4 * 1} = \frac {12} {4} = 3[/tex]
Thus, the rate is[tex]3 \frac {miles} {hour}[/tex]
Mark's dog runs at a rate of [tex]3 \frac {miles} {hour}[/tex]
ANswer:
[tex]3 \frac {miles} {hour}[/tex]
