Identify intervals on which the function is increasing, decreasing, or constant.
g(x) = 2 - (x - 7)2
increasing: x < 2; decreasing: x > 2
increasing: x < -7; decreasing: x > -7
increasing: x < 7; decreasing: x > 7
increasing: x > 2; decreasing: x < 2

G ( x ) = 2 - ( x - 7 )²
g ( x ) = 2 - ( x² - 14 x + 49 )
g ( x ) = 2 - x² + 14 x - 49
g ( x ) = - x² + 14 x - 47
The maximum of the function is at:
x= - b / 2 a
x = - 14 / ( - 2 ) = 7
Therefore the function is increasing form x ∈ ( - ∞, 7 ) and decreasing for x ∈ ( 7, +∞ ).

C.   increasing, x < 7; decreasing x > 7.

No a triangle cannot be formed because when you add the two smallest number together (which would be 11) the have to be bigger than the number it is "against" ( which would be 12)

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