Solve the inequality - 7x >21. What is the graph of the solution

-3 > x

Explanation:

-7x > 21

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-7 - 7

x < - 3

Now, whenever we divide or multiply by a negative, we reverse the inequality symbol.

In order to graph this, you do what I call the zero-interval test, which in this case, we plug in 0 for x, and determining whether the statement is false or true, determines which side we shade:

0 < - 3 [Since this is a false statement, instead of shading to the right, we shade to the left.]

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