write the equation of the line which passes through the point A with the slope :

thank you very much for the help...:)

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- Nov 25th 2006, 01:00 AM^_^Engineer_Adam^_^please help on my analytic geometry
write the equation of the line which passes through the point A with the slope :

thank you very much for the help...:) - Nov 25th 2006, 01:12 AMearboth
- Nov 25th 2006, 01:14 AM^_^Engineer_Adam^_^
I see

thanks alot! - Nov 25th 2006, 01:15 AMCaptainBlack
- Nov 25th 2006, 06:58 AMSoroban
Hello, ^_^Engineer_Adam^_^!!

There is only one formula to learn . . . Forget the others!******

**Point-Slope Formula**

Given a point and the slope

. . the line through point with slope is:

. . . . .

Quote:

Write the equation of the line which passes through the point with the slope :

Quote:

~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

******[rant]

These two problems can be solved easily with the form:

But I find the alternate forms unnecessary/confusing/annoying.

Did you know that some textbooks teach you**four**formulas?

. . . in case you're given the slope and any point

. . . in case you're given the slope and the y-intercept

. . . in case you're given two points

. . . in case you're given the two intercepts

(2) is unnecessary because the y-intercept is simply a point

. . .and we can use formula (1).

(3) is unnecessary because, given two points, we can find the slope

. . .with the formula: ... and we can use formula (1).

(4) is unnecessary because we are given two points and

. . . The slope is: ... and we can use formula (1).

[/rant]