PCA (Prometheus Certified Associate) sample exam question with answer 429

Question:
Which of the following functions can be used to calculate the percentage change of a metric over a specified time range?

1. delta
2. increase
3. rate
4. changes

Answer:
B - is correct answer. The increase function calculates the absolute increase of a counter over a specified time range. This can be used to calculate the percentage change of a metric by dividing the increase by the starting value of the metric