Final answer:
The question is related to linear equations in discrete mathematics, where all provided options (A, B, and C) represent linear equations; hence, the correct option is A) Solutions, B) Questions and C) Exercises
Step-by-step explanation:
The question deals with the topic of linear equations, which are fundamental concepts in discrete mathematics and its applications. Understanding linear equations is crucial for students as it forms the basis for learning more complex mathematical concepts.
A linear equation in two variables, x and y, is any equation that can be written in the form y = mx + b, where m and b are constants.
Looking at the provided options, A) y = -3x, B) y = 0.2 + 0.74x, and C) y = -9.4 - 2x, we see that they all fit this form, indicating they are all linear equations.
The correct option is A, B, and C, as all the given equations are linear and adhere to the standard format of a linear equation. This concept is an example of the exercises one may find in a discrete mathematics textbook, under a chapter on linear equations or in problem-solving sections. These exercises help students in developing their understanding and skills in handling linear equations.