Question

Triangle
A
B
C
is shown below.

Triangle A-B-C is shown on a coordinate plane with vertex A located at (negative 4, 5), B located at (negative 1, 4), and C located (negative 3, 2).

What are the coordinates of the image of
B
when
△
A
B
C
is rotated 90 degrees clockwise about the origin?

A.
(
1
,
4
)

B.
(
−
4
,
−
1
)

C.
(
1
,
−
4
)

D.
(
4
,
1
)

Answer 1

Rotate 90° clockwise: (x,y) → (y, −x). For B(−1,4) this gives (4, −(−1)) = (4,1).

Answer: D.