Question 323512
y= -4/3x - 10/7 
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The formula you have is used to find the
slope when you have two points.  You do
not have two points.
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But you do have the equation of the line
in slope-intercept form: y = mx+b.
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Since y = (-4/3)x - (10/7)
slope = -4/3
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Cheers,
Stan H.