Question

which order pair is a reflection of (3,7) across the x axis

Answer 1

The reflection of  order pair  of any point  across x-axis is given below -
(x , y) → (x , -y)

According to question -
The order pair is a reflection of (3,7) across the x axis is = (3 , -7)

Hope it will help u ...

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Best of luck ;)
ROYALJATT

Answer 2

Across the x axis reflection

(x,y) becomes (x,-y)

(5,7) becomes (5,-7)

best way to visualize is to draw your x and y graph with

x,y

quadrant 1 (+,+)

quadrant 2 (-,+)

quadrant 3 (-,-)

quadrant 4 (+,-)

(5,7) is in quadrant 1 and it reflects (like a mirror) on the x axis it will reflect opposite on the x axis which is quadurant 1 facing quadrant 4 on your graph. Thus (+,-) making (5,-7).

I hope helped ✌️