5. The vertices of a triangle are P(–4, 1), Q(–2, –8), and R(8, –1). Name the vertices of the image reflected across the x-axis.

Question

5.   The vertices of a triangle are P(–4, 1), Q(–2, –8), and R(8, –1). Name the vertices of the image reflected across the x-axis.

amistre64 · Answer

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anonymous · Answer

An image reflected over the x axis is in the same position on the x axis, but the opposite position on the y axis.
For example, if you had a line at (4,2) to (8,5) and you reflected it over the x axis it would be at (4,-2) to (8, -5)
Now apply that to your problem and what do you get?

anonymous · Answer

so it would be P'(4, –1), Q'(2, 8), R'(–8, 1)

amistre64 · Answer

Q' you dropped a -

-2,8

anonymous · Answer

No. You moved it on the x axis as well. Your x values don't change when you're only reflecting over the x axis, it's horizontal position isn't changing, only it's vertical one.

anonymous · Answer

amistre64, they changed all the x numbers, not just Q.

anonymous · Answer

ohh so P'(–4, –1), Q'(–2, 8), R' (8, 1)

amistre64 · Answer

yeah :)  i noticed that after you mentioned it; it hard for me to scroll up and down and recall what it was I seen lol

amistre64 · Answer

P(–4, 1)    Q(–2, –8)   R(8, –1).  y to -y
       -1               8            1

yep