MaeganR
#14. Write an equation of a line that has the slope of -1/2 in each form.
a. point-slope form
b. slope-intercept form
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MaeganR
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@erdog82 @Butterfly16 @chihiroasleaf
erdog82
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First, I believe you have to decide what points you want to use to get the slope of -1/2
MaeganR
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|dw:1358117562513:dw|
MaeganR
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could this help me?
erdog82
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some points could be (4,-1) (6,-2)
MaeganR
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so how do i write an equation of a line that has a slope of -1/2 in point-slope form, and slope-intercept form.
erdog82
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well what is y1
MaeganR
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-1
?
erdog82
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yup, so so far we have y+1= -1/2 x - x1 what is x1?
MaeganR
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4
MaeganR
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?
erdog82
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yup, so then we have y+1=-1/2 x -4
MaeganR
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thats it for a? we don't have to solve?!
now how do we do b? y=mx+b
erdog82
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what did you have to do for 13 on your last question?
MaeganR
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what do you mean?
erdog82
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you have to subtract 1 from -4
MaeganR
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so its -5
erdog82
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so then what do you get?
MaeganR
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-5 ?
erdog82
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so then its y=-1/2 x - 5
erdog82
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and your done!
MaeganR
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now i have 10 problems of standard form to do and 15 problems to do of parallel and perpendicular lines but i don't want to keep bothering you.
erdog82
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oh, don't worry, it will help me! I am in "Enriched Algebra" and I just learned that, and I understand it really well - helping you will help me study and practice!