changing rate
noun phraseUK /ˈtʃeɪndʒɪŋ reɪt/
US /ˈtʃeɪndʒɪŋ reɪt/
A changing rate is how fast something goes up or down over time.
The changing rate of the plant's growth showed it was getting taller faster each week.
RELATED WORDS
OTHER MEANINGS
2. In math, the speed at which one quantity changes compared to another.
The changing rate of the car's speed told us how quickly it was speeding up.
3. A price or fee that is not fixed and can go up or down.
The bank offered a changing rate on the savings account, so the interest was different each month.
4. The pace at which something happens differently over time.
Scientists measured the changing rate of the ice melting in the Arctic.