Question 45438
(a) plot the points in a coordiunate plane.
Points (2,-1), (4,3)
{{{ graph( 600, 500, -3, 10, -10, 10, 2x-5) }}}

.
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(b) find the distance between them.


{{{distance (d) = sqrt( (x1-x2)^2 + (y1-y2)^2) }}} 
{{{distance (d) = sqrt( (2-4)^2 + (-1-3)^2) }}} 
{{{distance (d) = sqrt( (-2)^2 + (-4)^2) }}}
{{{distance (d) = sqrt( (4) + (16)) }}}
{{{distance (d) = sqrt( (20)) }}}
{{{distance (d) = 2sqrt( (5)) }}}
d = 4.472



(c) find the midpoint of the segment joins them. 
((c) find the midpoint of the segment joins them.
Midpoint = [ (x1+x2)/2, (y1+y2)/2 ]
Midpoint = [ (2+4)/2, (-1+3)/2 ]
Midpoint = [ 6/2, 2/2 ]
Midpoint = (3, 1)