SOLUTION: Find y if the line through (9,3) and (-7,y) has a slope of -3/13

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Question 1101065: Find y if the line through (9,3) and (-7,y) has a slope of -3/13
Found 2 solutions by josmiceli, ikleyn:
Answer by josmiceli(19441)   (Show Source): You can put this solution on YOUR website!
slope = [ change in y ] / [ change in x ]


Multiply both sides by




-------------------
check:




OK
Answer by ikleyn(52781)   (Show Source): You can put this solution on YOUR website!
The slope of a straight line passing through two given points  (,)  and  (,)  is:

m = .


Substitute the given data into this equation


 = .


Simplify and solve for "y":


 = ,  or,  equivalently,   = .


y - 3 =  =  =   ====>  y =  = .


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