Question

What are the coordinates of D’

Answer 1

(-2,-1)

Explanation:

Reflection across the x-axis is:
`(x,y)\rightarrow(x,-y)`

We need to multiply the y-value of the pre-image by negative one to get reflected across the x-axis.

1 * -1 = -1

So:

`(-2,1)\rightarrow(-2,-1)`

D' should be (-2,-1).