Question 1166656
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Instead of doing your problem for you, I'll do one exactly in every detail like
yours.  Use it as a model for your problem. The problem I will do is this:
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find the equation of the line that passes through the point (-14,15) and
(7,-3) in POINT-SLOPE FORM
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First we find the slope m using the slope-formula:

{{{m=(y[2]-y[1])/(x[2]-x[1])}}} 

{{{m=((-3)-(15))/((7)-(-14))}}}

{{{m=(-3-15)/(7+14)}}}

{{{m=(-18)/(21)

{{{m=-6/7}}}

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Substitute (x<sub>1</sub>,y<sub>1</sub>) = (-14,15) and m = -6/7 into

y - y<sub>1</sub> = m(x - x<sub>1</sub>)

y - (15) = (-6/7)(x - (-14))

{{{y - 15 = expr(-6/7)(x + 14)}}}

That's it in point-slope form.  
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If they had said to write your answer in slope-intercept 
form you would have had to take it further to the form y=mx+b:
 y-15=(-6/7)x-12
 y=(-6/7)x+3
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Edwin</pre>