SOLUTION: Which statement is true about this function f(x)= -4x^2-8x+4 a) the range is less than or equal to 4 b) the range is less than or equal to 8 c) the domain is greater than or equ

Question 935284: Which statement is true about this function f(x)= -4x^2-8x+4
a) the range is less than or equal to 4
b) the range is less than or equal to 8
c) the domain is greater than or equal to 0
d) the domain is greater than or equal to -1
Found 3 solutions by Rosseta786, MathLover1, MathTherapy:
Answer by Rosseta786(21)   (Show Source): You can put this solution on YOUR website!
B is true
Answer by MathLover1(20849)   (Show Source): You can put this solution on YOUR website!

domain: , all real numbers
interval: (,)
range:
{ element : }
(,]
so, your answer is: b) the range is less than or equal to
Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!
Which statement is true about this function f(x)= -4x^2-8x+4
a) the range is less than or equal to 4
b) the range is less than or equal to 8
c) the domain is greater than or equal to 0
d) the domain is greater than or equal to -1

Since a < 0, the parabola y will have a maximum
x-coordinate of vertex: ___________________

With x-coordinate of the vertex of the parabola at: , its y-coordinate is:
, or , or
Thus, the range of the parabola will be:
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