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Hey I'm studying for my EOC test and I don't remember how to find the equation of a line without using a graph.  I have the point (5.5) and a slope of 5/4 Any help?

 Jan 3, 2016
 #1
avatar+128661 
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Use the point-slope form

 

y - y1 = m ( x - x1)         where m = the slope and  (x1, y1)  = (5, 5)   ..... so we have

 

y - 5  = (5/4) (x - 5)         simplify

 

y - 5 = (5/4)x  - 25/4       add 5 to both sides

 

y =  (5/4)x - 25/4 + 5

 

y = (5/4)x - 25/4 + 20/4

 

y = (5/4)x - 5/4        and that's in slope-intercept form

 

 

 

cool cool cool

 Jan 3, 2016

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