Final answer:
The unit rate of temperature increase of water in a dog bowl due to the warming of the sun is 2.25 degrees per hour.
Step-by-step explanation:
The student asks about the unit rate of temperature increase when water in a dog bowl warms up due to sunlight. To find the unit rate per hour, we calculate how much the temperature rises in one hour. The temperature rises by 3/4 of a degree every 1/3 of an hour. Multiplying the change in temperature by 3 (since there are three 1/3 hours in a full hour) gives us the rate per hour. Therefore, the unit rate is 2.25 degrees per hour (since 3/4 * 3 = 2.25).