What adjustment should be made to the speed of a sprayer to reduce output by half?

To reduce the output of a sprayer by half, it is necessary to adjust the speed of the sprayer appropriately. When a sprayer's speed is increased, the area covered in a given time frame also increases, which corresponds to a greater output of the product being applied. Conversely, if the speed is reduced, the output in that same period decreases.

In this case, halving the speed of the sprayer effectively doubles the time the sprayer spends over a specific area, resulting in a greater volume of herbicide being applied to that area. This relationship is governed by the principle that output is proportional to speed: if you want to decrease output to half, you must slow down the application rate, or in other words, halve the speed of the sprayer.

Other options do not correctly achieve a reduction by half. Doubling the speed would lead to an increase in output, while quadrupling the speed would increase it even more. Maintaining the current speed would keep output the same, which does not meet the goal of reducing it.