Question

what is the coordinate of a after triangle abc is reflected across the y - axis?
o a. a(3, - 5)
o b. a(5,3)
o c. a(-5, - 3)

Explanation:

Step1: Find original coordinate of A

From the graph, A is at $(-5, 3)$.

Step2: Apply y-axis reflection rule

Rule: $(x, y) \to (-x, y)$. So $(-5, 3) \to (5, 3)$.

Answer:

b. A'(5,3)