A toy car is placed at 0 on a number line. It moves 9 cm to the left, then 4 cm to the right, and then 6 cm to the left. The tot
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For the limit approaching 3 from the right, you want to follow the line to the right of x = 3. From the graph you're describing it sounds like that's y = -3. 
The RHS limit is -3 even though f(3) = 7
The RHS limit is -3 even though f(3) = 7