The function t(h) = 2h – 10 gives the outdoor temperature, in degrees Fahrenheit, h hours after midnight.
What is the meaning of the y-intercept?
A. The temperature was –10°F at midnight.
B. The temperature was 5°F at midnight.
C. The temperature was 0°F at 5 a.m.
D. The temperature was 0°F at 10 a.m.
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Well, can you point out the y-intercept in the equation?
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yes my bad XD my dad walked over and I got sidetracked while typing XD
When an equation is in the form of y=mx+b (which is what you have) m=slope and b=y-intercept, so yes, the y-intercept is -10 c:
look at it this way...the h = hours after midnight.
so if you sub in 0 for h...0 hrs after midnight....you would get the temp at midnight.
t(h) = 2h - 10
y = 2h - 10
y = 2(0) - 10
y = -10
so that is the temp at midnight
Makes sense leaving you with A for the correct answer
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