The violent crime rate was highest in each city when the level of lead was highest. This can be clearly seen in the graph depicted.
What do you mean by Violent crime?
A violent crime may be defined as a condition when someone physically hurts or threatens to hurt someone, and also includes crimes where a weapon is used.
Violent crime changes the scenario of the atmosphere to a large extent. Because these crimes involve the activity of certain weapons that emits heavy metals like lead and arsenic. It affects health drastically. So, in the graph, it can be easily understood with reference to four cities.
Therefore, the violent crime rate was highest in each city when the level of lead was highest.
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https://brainly.com/question/23348902