anonymous
  • anonymous
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)
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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TheSmartOne
  • TheSmartOne
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
  • TheSmartOne
And why is the point-slope form?
anonymous
  • anonymous
idk

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TheSmartOne
  • TheSmartOne
Ok, then google "point-slope form" and tell me what it is.
anonymous
  • anonymous
Point slope form is also the quickest method for finding the equation of line given two points
TheSmartOne
  • TheSmartOne
what equation does it show you that you get for point-slope form?
anonymous
  • anonymous
idk im bad at math
TheSmartOne
  • TheSmartOne
Not an excuse... Read the first 2 paragraphs: http://www.purplemath.com/modules/strtlneq2.htm
TheSmartOne
  • TheSmartOne
Point slope form is: \(\sf y – y_1 = m(x – x_1)\)
anonymous
  • anonymous
ok?
TheSmartOne
  • TheSmartOne
calculate the slope first...
anonymous
  • anonymous
idk how
TheSmartOne
  • TheSmartOne
Read my first reply on your post, it shows you how to.
anonymous
  • anonymous
i got 2.3 for theslope
TheSmartOne
  • TheSmartOne
How? Where is the work?
anonymous
  • anonymous
http://www.calculator.net/slope-calculator.html?type=1&x11=-3&y11=-1&x12=-6&y12=-8&x=84&y=12
TheSmartOne
  • TheSmartOne
*facepalm* You used a calculator, yet you plugged in the wrong point...
anonymous
  • anonymous
my name explains me man
TheSmartOne
  • TheSmartOne
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
  • anonymous
now what
TheSmartOne
  • TheSmartOne
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
  • anonymous
-3
anonymous
  • anonymous
can u just tell me answer
TheSmartOne
  • TheSmartOne
\(\sf (-3, -1)\) and \(\sf (-6,8)\) are both in the form of \(\sf (x_1,y_1)\) substitute any point into the equation.

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