Answer:
Picture 1 is the answer.
Step-by-step explanation:
The expression states that the absolute value of a number x , is equal to the number 7. Absolute Values have an 2 inputs for every output (except for 0), the negative and positive inputs both output the same positive number.
Example: abs(-5) = abs(5) = 5
The Absolute value of -5 and 5 both output 5. Therefore, there are two possible x values for the answer to be 7 and those values are -7 and 7. Since these are the only possible values they would be represented on a number line as closed dots.
The only picture with closed dots on both -7 and 7 is picture 1. So that is the answer.
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