Lines and Slope  Chameleon Home  Ask Dr. Math 

The Right yIntercept We just wrote an equation for a line with a slope of 3 going through the origin. Let's slide our old line up the yaxis so it has a yintercept of 2. We have to do this carefully, so the slope of the line will still be 3. The yellow fly used to be at point
In every row of the table, the new ycoordinate is 2 more than the old ycoordinate. Let's write this as an equation: new y = old y + 2 But we already know that the old ycoordinate is the same as 3 times the xcoordinate. So we can rewrite our equation as: new y = 3*x + 2 Now we have an equation for our new line. Let's drop the "new" and just say y = 3*x + 2 What do the numbers in this equation mean? Well, the slope of the line is 3, and its 
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