A linear equation is said to be in standard form when it is written in what form?

1. The definition states directly that a linear equation is in standard form when written as Ax + By = C. 2. The slope-intercept style y = Ax + B rearranges the same idea but is not called standard form. 3. Flipping the sign to Ax - By = C or rearranging into x + y = AB does not match the definition given. _Source: OpenStax Elementary Algebra (CC BY 4.0), Ch 4 "Graphs", section 4.1 Use the Rectangular Coordinate System_