Question 1131758

 use the midpoint formula to solve:


 the {{{x}}} coordinate is {{{(x[1]+x[2])/2 }}}

 the {{{y}}} coordinate is {{{(y[1]+y[2])/2 }}}


given: P({{{1}}},{{{-1}}}) and Q({{{7}}},{{{-3}}})


Plug in the values, 

the {{{x}}} coordinate: {{{(1+7)/2 }}}={{{4}}}

the {{{y}}} coordinate: {{{(-1-3)/2 }}}={{{-2 }}}


so, the midpoint is at point ({{{4}}},{{{-2}}})