Question

3.3 classwork - reflections - graded
state the image of the point (3, 7) after a reflection across the y - axis:

Explanation:

Step1: Recall reflection rule

When reflecting a point $(x,y)$ across the y - axis, the rule is $(x,y)\to(-x,y)$.

Step2: Apply the rule

For the point $(3,7)$, where $x = 3$ and $y=7$, after reflection across the y - axis, $x$ becomes $-3$ and $y$ remains the same. So the new point is $(-3,7)$.

Answer:

$(-3,7)$