Answer:
Option 4th is correct
$5 per hour
Step-by-step explanation:
Unit rate defined as the rate are expressed as a quantity as 1 such as 3 meter per seconds or 5 kilometer per hour.
As per the statement:
Miguel babysits for 3 hours and earns $15.
⇒Cost = $15 and
Time = 3 hours
By definition we have;
[tex]\text{Unit rate per hour} = \frac{15}{3}[/tex]
⇒[tex]\text{Unit rate per hour} = \$5[/tex]
Therefore, the unit rate is, $5 per hour