The correct answer is B. The axes of a graph extend both vertically and horizontally.
Explanation:
The word "axes" refers to the vertical and horizontal lines that can be found in a graphic and that is used as a reference to show a relationship or function. According to this definition, the sentence that uses the word "axes" correctly is "The axes of a graph extend both vertically and horizontally" because in this the axes correctly refer to the lines used in a graphic and also it is correct they are vertical and horizontal. Also, in other sentences the word "axes" is not used in the context of graphs or the word does not fit the definition.
