Given the points E(-5, -7) and F(-9, -8). a.) Find the equation of line EF. b.) Find the line parallel to line CD that passes through (-2, -5). c.) Find the line perpendicular to line CD that passes through (-10, -1).
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the line eq ; ( y - y1 ) / ( x - x1 ) = ( y2 - y1 ) / ( x2 - x1 )
( y +7 )/ ( x +5 )=(-1) / ( -4 ) = 1 / 4
4y + 28 = x + 5
4y - x - 23 = 0 ( the EF line eq .)
what is line CD ??
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