Question

using the pencil, plot the reflection of point a across the y - axis.

Explanation:

Step1: Identify coordinates of A

Point A is at $(7, 0)$

Step2: Apply y-axis reflection rule

For reflection over y-axis, $(x,y) \to (-x,y)$. Substitute $x=7, y=0$:
$(-7, 0)$

Answer:

The reflection of point A across the y-axis is the point at coordinates $(-7, 0)$ (plotted on the x-axis at -7, 0).