the rain began very slowly, then got much heavier and finally tapered off. which graph models the situation

Where's the model?

Answer: B

Step-by-step explanation:

Since the x-axis is showing time, the graph must increase the entire time. The steepest part of the graph will be in the middle when the heaviest rain occurred. The rain did not fall at a constant rate so it cannot be linear. Therefore the correct graph is B.