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Math help

 
 
Reply Thu 19 Mar, 2009 04:26 pm
Write an equation in standard form for the line with slope 5/8 that contains the point (2,2)
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Type: Question • Score: 4 • Views: 1,114 • Replies: 3
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McTag
 
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Reply Thu 19 Mar, 2009 05:18 pm
@shopaholik927,

Do it yourself.
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solipsister
 
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Reply Thu 19 Mar, 2009 07:53 pm
@shopaholik927,
why

oops i mean y= mx + b

with x,y (2,2) and the gradient m = 5/8 so far so flucky

so substituting the numbers into x and y, don't ask why

2 = (5/8)times (2) + b

thusly muchly b= 2 - 5/4 which is way over simpliflying

so b= 3/4 ( yay we have a y intercept) on this august occasion

so y = mx +b

y = (5/8)x + 3/4

all tweezy, it's all addition and if you don't like it don't worry you'll be fine doing other stuff





raprap
 
  2  
Reply Sat 21 Mar, 2009 04:24 am
@solipsister,
that's not standard form, thats slope intercept fotm
Quote:
so y = mx +b

y = (5/8)x + 3/4


standard form is

Ax+By=C

or
mult y=(5/8)x+3/4 by 8
8y=5x+6 which goes to with a simple subtraction
-5x+8y=6

now that's standard form QED

Rap
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