Chapter 11, Problem 5PT

To determine

To find:the coordinates of point R after a clockwise rotation of ${270}^{\circ }$ about the origin.

Answer to Problem 5PT

B. $R^{\prime }\left(-2,1\right)$ .

Explanation of Solution

Given:

The given graph is

  

And the options are:

  $R^{\prime }\left(-1,-2\right)$

  $R^{\prime }\left(-2,1\right)$

  $R^{\prime }\left(2,1\right)$

  $R^{\prime }\left(2,-1\right)$

Calculation:

The graph of the $\Delta RST$ (black) with the ${270}^{\circ }$ clockwise rotation about the origin.

From this, $R^{\prime }\left(-2,1\right)$

Hence the correct option is B.