Question: Which of the following represents the standard form of a linear equation?

Options:

1. y = mx + b
2. Ax + By = C
3. y = ax^2 + bx + c
4. x^2 + y^2 = r^2

Correct Answer: Ax + By = C

Solution:

The standard form of a linear equation is Ax + By = C, where A, B, and C are constants.