Answer:
3 3/4 degrees per minute
Step-by-step explanation:
You want to know the rate of increase in temperature per minute when it is 1 1/4 degrees in 1/3 minute.
Rate
The time period of interest, 1 minute, is 3 times the time period associated with a 1 1/4 degree increase. Then the increase in 1 minute will be 3 times that 1 1/4 change:
3 × (1 1/4) = 3×1 + 3×(1/4) = 3 3/4
The rate is 3 3/4 °F per minute.
