Question

Which of the following is a reflection of ( 2,4 ) across the x-axis?

a -2, 4

b 2, -4

c 4, 2

d -2, -4

Answer 1

(2,-4)

Explanation:

(2,4) is located in Quadrent I (+,+), if you reflect over the x-axis, it would be in Quadrent IV (+,-).

if you dont understand I suggest you draw a coordinate plane on a graphing notebook.