What is the equation of the line, in point-slope form, that passes through the points (-3, -1) and (-6, 8)?

y + 8 = -3(x - 6)

y - 8 = -3(x + 6)

y + 8 = 3(x - 6)

y - 8 = 3(x + 6)

Question

What is the equation of the line, in point-slope form, that passes through the points (-3, -1) and (-6, 8)?

    y + 8 = -3(x - 6)

    y - 8 = -3(x + 6)

    y + 8 = 3(x - 6)

    y - 8 = 3(x + 6)

thesmartone · Answer

The slope of two points: $\sf (x_1,y _1)$ and$\sf (x_2,y_2)$ is:

$\sf\Large Slope=\frac{y_2-y_1}{x_2-x_1}$

thesmartone · Answer

And why is the point-slope form?

anonymous · Answer

idk

thesmartone · Answer

Ok, then google "point-slope form" and tell me what it is.

anonymous · Answer

Point slope form is also the quickest method for finding the equation of line given two points

thesmartone · Answer

what equation does it show you that you get for point-slope form?

anonymous · Answer

idk im bad at math

thesmartone · Answer

Not an excuse... Read the first 2 paragraphs: http://www.purplemath.com/modules/strtlneq2.htm

thesmartone · Answer

Point slope form is:

$\sf y – y_1 = m(x – x_1)$

anonymous · Answer

ok?

thesmartone · Answer

calculate the slope first...

anonymous · Answer

idk how

thesmartone · Answer

Read my first reply on your post, it shows you how to.

anonymous · Answer

i got 2.3 for theslope

thesmartone · Answer

How? Where is the work?

anonymous · Answer

http://www.calculator.net/slope-calculator.html?type=1&x11=-3&y11=-1&x12=-6&y12=-8&x=84&y=12

thesmartone · Answer

*facepalm* You used a calculator, yet you plugged in the wrong point...

anonymous · Answer

my name explains me man

thesmartone · Answer

this will give you the correct slope... http://www.calculator.net/slope-calculator.html?type=1&x11=-3&y11=-1&x12=-6&y12=8&x=92&y=4

anonymous · Answer

now what

thesmartone · Answer

You have the slope, so now you can plug it into:

$\sf y – y_1 = m(x – x_1)$

m=slope

$\sf (x_1,y_1)$ is a point

what is the slope again?

anonymous · Answer

-3

anonymous · Answer

can u just tell me answer

thesmartone · Answer

$\sf (-3, -1)$ and $\sf (-6,8)$ are both in the form of $\sf (x_1,y_1)$

substitute any point into the equation.