Question

d is the image of the point d after a reflection.
d(10, 6) → d(-10, 6)
over which axis was point d reflected?
x-axis y-axis

Explanation:

Step1: Recall reflection rules

For reflection over the \( y \)-axis, the rule is \( (x,y) \to (-x,y) \). For reflection over the \( x \)-axis, the rule is \( (x,y) \to (x,-y) \).

Step2: Analyze the given points

The original point \( D \) is \( (10, 6) \) and its image \( D' \) is \( (-10, 6) \). Here, the \( x \)-coordinate changes sign (from \( 10 \) to \( -10 \)) and the \( y \)-coordinate remains the same (\( 6 \) to \( 6 \)). This matches the reflection rule over the \( y \)-axis.

Answer:

y - axis (The option: y - axis)