PLZ NEED A PROFESSIONAL :( Which is the equation of a parabola with a directrix at y = 2 and a focus at (5, 0).
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y = one fourth(x − 5)2 + 1
y = one fourth(x + 1)2 − 5
y = −one fourth(x + 1)2 − 5
y = −one fourth(x − 5)2 + 1

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?