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How do you find the range of #y = 4x - x^2#; given Domain = {-1, -2, 0}?

1 Answer

Oct 9, 2017

#y in {-5,-12,0}#

Explanation:

The domain is #x in {-1,-2,0}#
This means that the value of #x# can ONLY be those numbers. (Because of this { } bracket)

So, when we put #x=-1# in #y# then #y=-5#

when we put #x=-2# in #y# then #y=-12#

when we put #x=0# in #y# then #y=0#

Therefore the range is #y in {-12,-5,0}#

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