SOLUTION: find the domain and range of: A)y=3x-9 B)y=-|x|+2 C)y=2x^2+6x-7

Algebra ->  Functions -> SOLUTION: find the domain and range of: A)y=3x-9 B)y=-|x|+2 C)y=2x^2+6x-7      Log On


   

Question 776018: find the domain and range of: A)y=3x-9 B)y=-|x|+2 C)y=2x^2+6x-7
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
find the domain and range of:
A)y=3x-9
Domain and Range are "All Real Numbers".
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B)y=-|x|+2
Domain: All Real Numbers
Range: All Real Numbers <= 2
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C)y=2x^2+6x-7
Find the vertex:
x = -b/(2a) = -6/(-4) = 3/4
Then f(3/4) = -30.38
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Domain: All Real Numbers
Range:: All Real Numbers >= -4.061
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Cheers,
Stan H.
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