Functions f, g, and h are shown on the graph. Which of these functions have a domain of all real numbers?
A. Functions f and g only
B. functions g and h only
C. Functions f only
D. Functions f, g, and h

Option (D)

Step-by-step explanation:

Domain of a function is defined by the x-values (input values) of the graph.

Similarly, Range is defined by the set of y-values (output values) of the graph of the function.

From the graph attached,

Domain of function 'f' : {x | x ∈ R}

Domain of function 'g' : {x | x ∈ R}

Domain of function 'h' : {x | x ∈ R}

Therefore, all the function graphed have domain of all real numbers.

Option (D) will be the answer.