Equation Of A Straight line?  TOPIC_SOLVED

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Equation Of A Straight line?

Postby Dockers_Girl on Sun Feb 27, 2011 12:59 am

Sorry about my last post, i put the working out for a differnt question and i dont know how to delete the question.
This is the real working out..

Find the equation of the following straight line
through (0,-1) and ( 2, -9)

-9-1 / 2-0 = -10/2

y=10/2x + c

x = 0 y = -1

-1 = -10/2 (0) + c

giving c = -1

my answer y = -10/2x - 1

but the answer is y = -4x - 1

What am i doing wrong?
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Re: Equation Of A Straight line?  TOPIC_SOLVED

Postby Martingale on Sun Feb 27, 2011 3:50 am

Dockers_Girl wrote:Sorry about my last post, i put the working out for a differnt question and i dont know how to delete the question.
This is the real working out..

Find the equation of the following straight line
through (0,-1) and ( 2, -9)

-9-1 / 2-0 = -10/2



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