hard · Enhanced ACT reading
A data set tracks the yield of two different crops based on annual rainfall.
| Rainfall (cm) | Corn Yield (bu/acre) | Soy Yield (bu/acre) |
| :--- | :--- | :--- |
| 40 | 120 | 35 |
| 60 | 180 | 48 |
| 80 | 210 | 55 |
Which of the following observations regarding the marginal increase in yield is correct?
- Corn yield increases by exactly 60 bushels per acre for every 20 cm increase in rainfall regardless of the total amount.
- The rate of increase in yield for both crops slows as rainfall increases from 60 cm to 80 cm.
- The optimal rainfall for Corn yield is 80 cm, as this is the point where the yield is highest in the recorded data.
- Soy yield will eventually exceed Corn yield if the annual rainfall continues to increase at a linear rate.
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