Answer:
Exponential increase.
Explanation:
Hi, to answer this question we have to analyze the information given:
During the worst period of hyperinflation in a certain country, the price of food increase at a rate of 25% per month.
So, we are increasing by a factor (1.25 or 125% every month), because we have that increase by a factor and not by a constant number, that increase is an exponential increase.
Feel free to ask for more if needed or if you did not understand something.