Solve the problem or provide an explanation.Graph y = -x2 + 4x + 5 and f(x) = 
together on your graphing calculator. State the domain of f(x) and explain the connection between the domain of f(x) and the graph of 
A. The domain of f(x) is [-1, 5]. The domain of f(x) is the set of all x-values for which the graph of 
is on or above the x-axis.
B. The domain of f(x) is ?. There is no connection between the domain of f(x) and the graph of 
C. The domain of f(x) is (-?, -1] ? [5, ?). The domain of f(x) is the set of all x-values for which the graph of 
is on or below the axis.
D. The domain of f(x) is (-?, ?). The domain of f(x) is the same as the domain of y = -x2 + 4x + 5.
Answer: A
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- 
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