Question

you can reflect a point across an axis in the coordinate plane. reflect point a across the y - axis.

Explanation:

Step1: Find coordinates of point A

From the graph, point A is at (4, 0) since it's 4 units to the right of the origin (0,0) on the x - axis and 0 units on the y - axis.

Step2: Apply reflection over y - axis rule

The rule for reflecting a point \((x,y)\) over the \(y\) - axis is \((x,y)\to(-x,y)\). For point A with \(x = 4\) and \(y=0\), substituting into the rule gives \((- 4,0)\).

Answer:

The reflected point of A across the \(y\) - axis has coordinates \((-4,0)\)