Using the concept of function, it is found that:
- Graphs B, C, D and F are functions.
- Graphs A and E are not functions.
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- In a function, one value of the input can be related to only one value of the output.
- In a graph, it means that for each value of x(horizontal axis), there can only be one respective value of y(vertical axis). That is, if a vertical line is traced at a value of x, it can cross the function only once, that is, there cannot be points aligned vertically.
- In graphs B, C, D and F, it can be seen that for each x value, there is only one respective y-value, thus, they are functions.
- In graphs A and E, for values of x, such as x = 3 for both, there are two respective values of y, thus they are not functions.
A similar problem is given at https://brainly.com/question/12463448
