Question 12553
You find the slope by using the Slope Equations which is 
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{{{ m = ( Y2 - Y1 ) / ( X2 - X1 ) }}} Substitute
{{{ m = ( 0 - 4 ) / ( -2 - (3/2) ) }}} simplify
{{{ m = -4 / (-7/2 ) }}} Keep Change Flip
{{{ m = ( -4/1 ) * ( -2 / 7 )}}} Multiply
{{{ m = 8/7 }}} That is your slope