Respuesta :

You switch the sign of the y coordinate for point b, so the new b coordinate is (-2,1)

Answer:

(-2,1)

Step-by-step explanation:

The point  b (-2,-1) lies in the third quadrant. A reflection over the x-axis will map the point in the second quadrant. In this quadrant, y is positive while x will still be negative. so we end up with;

(-2,1)