The range of the function of the graph of a quadratic function is all values of y which are greater than and equal to 1 option (A) is correct.
What is a quadratic function?
Any function of the form [tex]\rm f(x) = ax^2+bx+c[/tex] Where x is variable and a, b, and c are any real numbers where a ≠ 0 is called a quadratic equation.
We have shown in the graph a graph of a quadratic function.
As we can see, the domain of the function will be all real numbers because it is a polynomial function in the form of:
f(x) = ax² + bx + c
The graph opens up and does not exist in the third and fourth quadrant, so we can say the range of the function will be:
y ≥ 1
Thus, the range of the function of the graph of a quadratic function is all values of y which are greater than and equal to 1 option (A) is correct.
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