Finish Melinda’s rain gauge was empty when it began to rain on Tuesday. She observed the amount of rain in the rain gauge every 10 minutes for 60 minutes, and recorded the amount of rain, in inches, on the grid below.

Which statement is true about the relationship between time and rainfall?

The relationship between time and rainfall is not proportional because the amount of rain in the gauge is not related to the amount of time it rained.
The relationship between time and rainfall is not proportional because the rate of increase in the graph is not constant.
The relationship between time and rainfall is proportional because the graph indicates that as one variable increases, the other also increases.
The relationship between time and rainfall is proportional because the graph passes through the origin.