anonymous
  • anonymous
Write the equation of the line that passes through (2, 4) and (1, -3) in slope-intercept form.
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
A. y = 7x - 10 B. y = 7x + 10 C. y = 7x + 18 D. y = 7x - 18
anonymous
  • anonymous
@FireKat97
anonymous
  • anonymous
This is the last one slope is 7

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More answers

FireKat97
  • FireKat97
Yupp
pooja195
  • pooja195
\[\LARGE \frac{y_2-y_1}{x_2-x_1}=slope\] Find the slope first
anonymous
  • anonymous
its 7
pooja195
  • pooja195
\[\huge y-y_1=m(x-x_1)\] where m=slope (x1,y1)
FireKat97
  • FireKat97
yup, thats correct, now reapply the equation from earlier
pooja195
  • pooja195
now use this
anonymous
  • anonymous
i dont know how to get the intercept
FireKat97
  • FireKat97
you don't need to find the intercept, you just have to substitute any set of co-ordinates and the slope into the (y - y1) =m(x - x1) equation
FireKat97
  • FireKat97
The y intercept form is just the name of the form which follows this format y = mx + b
FireKat97
  • FireKat97
So thats how you have to re-arrange the equation once you sub your slope and co-ordinates in
anonymous
  • anonymous
I dont know what b is though
anonymous
  • anonymous
I dont get how to figure out if its 10 or 18
anonymous
  • anonymous
4+3=7(2-1)
anonymous
  • anonymous
Thats what i got what i plugges it in
anonymous
  • anonymous
plugged*
anonymous
  • anonymous
i just get 7=7
FireKat97
  • FireKat97
But you only need to plug in one set of the co-ordinates, so either (2, 4) or (-1, 3) into x1 and y1
FireKat97
  • FireKat97
Just pick the set which looks to have the "easier numbers" so smaller numbers etc
FireKat97
  • FireKat97
But it shouldn't matter which of the co-ordinates you choose
anonymous
  • anonymous
okay so( x+3)=7(x-1)
FireKat97
  • FireKat97
Yup, right hand side is correct, but with the left hand side, that should be a y, not an x
anonymous
  • anonymous
whoops haha
FireKat97
  • FireKat97
hahaha dw all good :)
anonymous
  • anonymous
now what
anonymous
  • anonymous
haha good!
FireKat97
  • FireKat97
So, now we can rearrange this equation to put it in the form of y = mx + b
FireKat97
  • FireKat97
so we want to move everything except the y to the right hand side
anonymous
  • anonymous
Its A
FireKat97
  • FireKat97
yup :D
anonymous
  • anonymous
Thank you!
FireKat97
  • FireKat97
no problem :)

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