Question

If 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 QꞌRꞌSꞌ when triangle QRS is reflected across the x-axis?
A. Qꞌ(−1, −2), Rꞌ(−3, −2), Sꞌ(−2, −4)
B. Qꞌ(1, 2), Rꞌ(3, 2), Sꞌ(2, 4)
C. Qꞌ(2, 1), Rꞌ(2, 3), Sꞌ(4, 2)
D. Qꞌ(2, −4), Rꞌ(6, −4), Sꞌ(4, −8)

Answer 1

B
The value of x does not change in reflection across the x axis while the sign of the value of y is reversed because it travels a distance equal to its distance from the x-axis in the negative y-axis.