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What is the range of the relation in the table below? x y –2 0 –1 2 0 4 1 2 2 0

Sanya noticed that the temperature was falling at a steady rate of 1.4 degrees every hour from the time that she first checked her outdoor thermometer. by 6 a.m., the temperature had fallen 21 degrees. which expression can you use to find how many hours earlier she had first checked the thermometer?

If you prove that ∆wxz is congruent to ∆yzx, which general statement best describes what you have proved?