The function f(x)=-x²-3 is not a graph as a straight line because it is a quadratic function option (A) is correct.
What is a function?
It is defined as a special type of relationship, and they have a predefined domain and range according to the function every value in the domain is related to exactly one value in the range.
We have a function shown in the options:
A. f(x)=-x²-3
It is a quadratic function.
B. F(x)=2x²/x+1/2
After canceling out the x function becomes:
F(x)=2x+1/2
It is a linear function.
C. f(x) = 3x-1/4
It is a linear function
D. F(c)= -4x
It is a linear function
Thus, the function f(x)=-x²-3 is not a graph as a straight line because it is a quadratic function option (A) is correct.
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