SOLUTION: if the line containing points (-8,m) and (2,1) is parallel to the line containing points (11,-1) and (7,m+1), what must be the value of m?

Question 150713: if the line containing points (-8,m) and (2,1) is parallel to the line containing points (11,-1) and (7,m+1), what must be the value of m?
Answer by vleith(2983) (Show Source): You can put this solution on YOUR website!
In order to two lines to be paralle, they need to have the same slope. Generally slope is assigned to a variable named "m". In this problem the points are using m in them, so use a different variable for slope.
slope using the first two points

slope using the second two points

Now set the two slopes equal

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