Sunday

April 20, 2014

April 20, 2014

Posted by **maxine** on Wednesday, May 13, 2009 at 9:06pm.

How do you find the slope-intercept form of the equation of the line passing through the points P(2,-9) and Q(3,-7)?

- pre-calculus -
**Reiny**, Wednesday, May 13, 2009 at 9:26pmfor the first:

slope = (7+2)/(4+4) = 9/8

then using the point (4,7)

y-7 = (9/8)(x-4)

8y - 56 = 9x - 36

9x - 8y = -20

check: is (-4,-2) on it?

LS = -36 + 16 = -20

= RS

for the second, find the slope in the same way I did in the first problem

use the point (2,-9) and the slope, sub it into

y = mx + b, solve for b

**Related Questions**

pre-calculus - How do you write the standard form of the equation of the line ...

math - i have more than one question so if u no any of the answers please tell ...

Quick math help - My math exam is coming up Friday and I need help!! Can you ...

Algebra - Rewrite into standard form (0,5), m=-3/5. Write the equation of the ...

algebra - Rewrite into standard form (0,5), m=-3/5. Write the equation of the ...

algebra - Find the slope of any line perpendicular to the line through the ...

Algebra - Choose 1 set of points from the choices below. Then, solve the problem...

Pre- Algebra - Given an equation of a line, how do I find equations for lines ...

Math - Write your answer in standard form. Show all your work if you want to be ...

algebra - Use the given conditions to write an equation for the line in point'...