Caitlin’s thermometer rises 16°C in 4 hours.Expressed as a unit rate, 16°C in 4 hours isa16°C/4 h b8°C/2 hc12°C/h d4°C/h

Break Down the Problem

1. We need to determine the unit rate of temperature rise per hour from the total temperature change over a given time period.

Relevant Concepts

2. The formula to calculate the unit rate is: $\text{Unit Rate} = \frac{\text{Total Change in Temperature}}{\text{Total Time}}$

Analysis and Detail

3. Given:

   • Total Change in Temperature = 16°C
   • Total Time = 4 hours

   Using the formula: $\text{Unit Rate} = \frac{16 \, \text{°C}}{4 \, \text{h}} = 4 \, \text{°C/h}$

Verify and Summarize

4. This means that Caitlin's thermometer rises at a rate of 4°C every hour. Thus, among the options given, the correct unit rate is indeed $4 \, \text{°C/h}$.

Final Answer

The correct answer is d) 4°C/h.