Refer to the figure below.
Which of the following is a valid conclusion from the data in the figure?
A) There is a correlation between IQ scores and levels of lead found in the blood.
B) People inherit genes that make them healthier and improve their IQ scores.
C) Environmental factors have a much greater effect on IQ scores than heredity.
D) Children who are exposed to lead have smaller brains than children who are not exposed to lead.

Question

Refer to the figure below.
 Which of the following is a valid conclusion from the data in the figure?
A) There is a correlation between IQ scores and levels of lead found in the blood. 
B) People inherit genes that make them healthier and improve their IQ scores. 
C) Environmental factors have a much greater effect on IQ scores than heredity. 
D) Children who are exposed to lead have smaller brains than children who are not exposed to lead.

Quizplus · Accepted Answer

The figure shows a clear correlation between increasing levels of lead in the blood and decreasing IQ scores. Therefore, it is valid to conclude that there is a correlation between IQ scores and levels of lead found in the blood. None of the other answer choices are supported by the data presented in the figure.

Refer to the Figure Below