Question 823424
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Hi,
what is the distance between 
(-5,-3) and 
(4,-7)   Distance = {{{sqrt((-9)^2 +4^2  )= sqrt(97)}}} 

D = {{{sqrt ((x[1]-x[2])^2+(y[1]-y[2])^2))}}}
Midpoint Pt(x,y):  ( {{{(x[1] + x[2])/2}}}, {{{(y[1] + y[2])/2  )}}})
Slope of line passing thru these two points: {{{m =(y[2] - y[1])/(x[2] - x[1])}}}
point-slope form the line passing thru these two points: {{{y - y[1] = m(x - x[1])}}}