The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D? (1 point)

Question

The coordinates of the vertices of CDE are C(1, 4), D(3, 6), and E(7, 4). If the triangle is reflected over the line y = 3, what are the coordinates of the image of D?  (1 point)

anonymous · Answer

attachment

amistre64 · Answer

subtract everything by 3; flip the y signs and add 3 back to it

amistre64 · Answer

subtract the y parts by 3 to lower the thing to the xaxis is what i menat; flip the y sings and add back the 3 to move it back in position

amistre64 · Answer

.... i got an A in typing; honest :)

amistre64 · Answer

or if we just stick to the math:

-(y-3)+3 = -y+3+3 = 6-y  to change the y parts

amistre64 · Answer

C(1, 4), D(3, 6), and E(7, 4)
        6          6                6
------------------------
        2           0                2

looks about right

phi · Answer

what are the coordinates of the image of D (3,6)
amistre explained how to do this using arithmetic.   Sometimes (especially with 1 point) a picture helps:
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