The pictorial representation of numerical data is called (a) picture graph (b) graph (c) pictograph (d) none
Hint: We will use the definition of picture graph, graph and pictograph to figure out the solution to this question.
Complete step-by-step answer: Before proceeding with the question, we should understand the definition of picture graph, graph and pictograph. A picture graph uses symbols and pictures to represent data. A graph is a series of points, discrete or continuous, as in forming a curve or surface, each of which represents a value of a given function. Representation of numerical data through graphs is called pictorial representation of data. Such representation is useful for the purpose of quick and clear understanding and also for making comparisons. Pictograph is a way of representing statistical data using symbolic figures to match the frequencies of different kinds of data. Now we begin with option (a). According to the definition of picture graph it is not the pictorial representation of numerical data, so option (a) is not the answer. Now we check option (b). According to the definition of graph it is the pictorial representation of numerical data, so option (b) is the correct answer. Let us now move on to option (c). According to the definition of pictograph it is not the pictorial representation of numerical data, so option (c) is not the answer. And option (d) is also not the answer. Hence option (b) is the only correct answer.
Note: Remembering the basic definitions of graph, picture graph and pictograph is the key here. But we have to understand that we plot any numerical data using graph only whereas the other two use pictures.