Posted by **mathstudent** on Wednesday, December 6, 2006 at 8:16pm.

Show that the formula for a line through two points (a1,b1) and (a2,b2) is:

y=(b1-b2)/(a1-a2) * x + (a1*b2-a2*b1)/(a1-a2)

The slope part looks right. Could someone explain how the y-intercept part makes sense?

I would think that the y-intercept is:

b1-slope*a1

or

b2-slope*a2

anyone have any ideas?

## Answer This Question

## Related Questions

- Algebra 1 help - Can someone tell me if my answers are right and explain how you...
- math- CAN SOMEONE PLEASE HELP - find the two ordered pairs of this equation. y=5...
- Algebra HELP!! - Write the equation of the line that contains the points (2, 2) ...
- Math - I cannot remember how to find the slope of a line when you are given two ...
- Math - Can someone please check my work? Write the slope-intercept (y = mx +b) ...
- College algebra - Okay theres another part to this equation and I'm not sure if ...
- math - i have more than one question so if u no any of the answers please tell ...
- algebra - Which of the following is not a step used when graphing the equation y...
- Math/Algebra do u know how to do slope intercept? - The following problems are ...
- algebra - Could someone please check my work. what is the slope of the line that...

More Related Questions