Find x when f(X)=1. (This means find the input that gives an output of 1.)
2 answers:
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A solid dot on the graph of an inequality indicates that the number is contained within the inequality, so yo should use 
or 
to represent that situation, whereas a white dot indicates that the number is not contained within the inequality.
Our graph is telling us that
is greater or equal than -1, and also is less than 3. So our inequality will be:
Our graph is telling us that
