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Jika di cerminkan thdp garis y=x maka
(x,y) menjadi (-y,-x)
x= -y'
y=-x'
Tinggal dimasukkan ke persamaan.
(-y^2)+(-x^2)-8(-x)+7=0
-y^2-x^2+8x+7=0
x^2+y^2-8x-7=0
No 2
Jika di refleksikan thdp sumbu y maka
(x,y) menjadi (-x,y)
x'=-x
y'=y
Y= (-x^2)-(-x)')
Y=-x^2+x
Y=x^2-x