Question

Do u know anything about transformations and coordinates? Pls help me check my answers!

The vertices of triangle QRS have coordinates Q(1, 2), R(3, 2), and S(2, 4).

Which coordinates are the coordinates of the vertices of triangle Q'R"S when triangle QRS is reflected across the x-axis?

A. Q (1, 2), R (3, 2), S (-24)

B. Q (1, 2), R (3, 2), S(2, 4)

C. Q (2, 1), R (2, 3), S (4, 2)

D. Q (2,4), R (6, 4), S (4, 8)

Answer 1

When you reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate is transformed into its opposite.

So;\[(x, y) = (x, -y)\] And you would apply this to the rest of them. If y is a negative, then: \[(x, -y) = (x, x)\] Think you can solve from here?

Answer 2

@Sexy_einstein

Answer 3

I think so! Thanks!

Answer 4

You're welcome! Make sure to close the question unless you have more!

Answer 5

Okie Dokie!