Answer quickly pls

What is the multiplicative rate of change of the exponential function shown on the graph?

This is the number of parts out of 100, the numerator of a fraction where the denominator is 100. submit

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?