Find a line perpendicular to the line through (-2,4) and (8,8) through the point (3,4)

Find a line perpendicular to the line through (-2,4) and (8,8) through the point (3,4)
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1 Answer

strate line thru 2 pointe: (-2,4) & (8,8)

deltax=10, deltay=4

slope=deltay/deltax=4/10=0.4

perpendikular line hav slope=-1/0.4....-2.5

perp line...y=-2.5x+sumthun

want it tu go thru (3,4)...projekt this line tu x=3

deltax=-3, deltay=-3*(-2.5)=7.5

so at x=0, need y=4+7.5=11.5

y=-2.5x+11.5
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