SOLUTION: How do I determine the increasing and decreasing intervals of: f(x)=4(x-4)^2-9

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Question 1187909: How do I determine the increasing and decreasing intervals of:
f(x)=4(x-4)^2-9
Answer by ikleyn(52788) About Me  (Show Source):
You can put this solution on YOUR website!
.

This function represents a parabola opened upward, with the symmetry axis x= 4, which is vertical line,

parallel to y-axis.



Therefore, the function increasing interval is  [4,oo),

while     the function decreasing interval is  (-oo,4].


Solved, answered and explained.