Question

the data in the graph are the result of a paramecium being placed in a hypertonic salt solution. paramecium contractile vacuole contractions. contractions per minute. what change would most improve the usefulness of the graph?

Explanation:

Adding numerical values for salt - concentration levels would make it easier to precisely interpret the relationship between salt concentration and contractile vacuole contractions. Currently, the terms 'very low', 'low', etc. are qualitative and lack specific numerical reference.

Answer:

Adding numerical values for salt - concentration levels.