When we want to find the equation of a line we can use:(adsbygoogle = window.adsbygoogle || []).push({});

[tex] Y-Y_1 = m(X-X_1)[/tex] or [tex] Y = mX + B[/tex]

My question is aren't both equations essentially the same?

For equation 1. If I know two points that the line passes through just by plugging and chugging won't that lead to what the Y intercept is?

For example I have these two points that a line passes through: (2,12) & (6,0).

by looking at the graph I know that the line has a Y intercept, even though it is not drawn. When I use equation one my constant (B) the Y intercept is 0 even though it should not be. What the heck am I doing wrong?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Almost ashamed to ask this question.

**Physics Forums | Science Articles, Homework Help, Discussion**