Question

1. the graph below shows the amount of noise pollution caused by factory machinery during a one - week period. which inference is best supported by the graph? a) the machinery was turned off on saturday and sunday. b) the level of pollution remained constant during working hours. c) the machinery ran 24 hours a day. d) the noise volume reached a peak on friday.

Explanation:

We observe the graph shows no noise pollution on Saturday and Sunday, indicating the machinery was likely off. The pollution level varies during work - days (ruling out B), and there are periods of no noise during work - days (ruling out C). The noise peaks are not highest on Friday (ruling out D).

Answer:

A. The machinery was turned off on Saturday and Sunday.