
### Instruction: help me answer this question Prove that the line through the point (x1, y1) and parallel to the line Ax + By + C = 0 is A (x – x1) + B (y – y1) = 0., think step by step
### Assistant: The slope of the given line is found, then the formula of the line passing through a point and having slope m is used, which gives the required equation. , The answer is The equation is A(x – x1) + B(y – y1) = 0
