Question 762662
When given two points; (X1,Y1) & (X2,Y2), the slope of the line is found by the following equation.
{{{m = (Y2-Y1)/(X2-X1)}}}
Plug in the values that you were given.
{{{m = (-9 - 5)/(-1 - -2)}}}
{{{m = -14/1}}}
{{{m = -14}}}
The slope of line D is -14.
Two line are parallel when they have the same slope. So the answer is -14