Aizhalee
  • Aizhalee
Can I have help please with slopes . using the slope intercept format, we can plug in what we know for our new line. y =mx+b 5 = -2(4) + b, solve for 'b' then re write the equation with only the m and b terms with numbers.
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Hi, so are you looking solve for b. I don''t understand what you mean by the other part. 5=-8+b, add 8 to both sides which cancels out the -8. b=13|dw:1436215552731:dw|
Aizhalee
  • Aizhalee
Thank you so much for your help, I appreciate it , I totally understand it now :)
anonymous
  • anonymous
The other part is just to set that y and x back to normal. So \[\large y=mx+b\\\large y=-2x+13\]

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anonymous
  • anonymous
Alright glad to help
anonymous
  • anonymous
y = -2x+13
Aizhalee
  • Aizhalee
@hafsa23 can you please help me with one so I can understand it please
anonymous
  • anonymous
Yes
Aizhalee
  • Aizhalee
The equation of line WX is y = −2x − 5. Write an equation of a line perpendicular to line WX in slope-intercept form that contains point (−1, −2).
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Aizhalee
  • Aizhalee
Can I have help with this please, I do not understand it at all . Thank you
anonymous
  • anonymous
Alright, so perpendicular means that the slope will be a negative reciprocal
anonymous
  • anonymous
\[Perpendicular line slope=1/2x\]
Aizhalee
  • Aizhalee
thats all ?
anonymous
  • anonymous
Now using x and y from (-1, -2) to find b
anonymous
  • anonymous
|dw:1436216196970:dw|\[y=1/2x-1.5\]
anonymous
  • anonymous
here's a better drawing|dw:1436216291146:dw|
anonymous
  • anonymous
does that help?
Aizhalee
  • Aizhalee
Yes but what letter is it ? A,B,C, or D ? what is the answer
anonymous
  • anonymous
C, \[y=1/2x-3/2\]
Aizhalee
  • Aizhalee
Thank you
anonymous
  • anonymous
You're welcome

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