6. Quadratic Inequalities
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Solve the quadratic inequality.
Error: The parabola is dashed.
Corrected Graph:
We will graph the given quadratic inequality y≥x2+2, then we will find the error. To graph the quadratic inequality, we will follow three steps.
Let's draw the graph of the related function, which is y=x2+2.
Since (0,0) produced a false statement, we will shade the region that does not contain the point. Also, note that the inequality is not strict. Therefore, the parabola will be solid.
Now, let's compare the correct graph with the given one.
We can see that there is only one mistake: in the given graph the parabola is dashed.