Answer:
G'(1,7), H'(-8,1), I'(-4,-5)
Step-by-step explanation:
The transformation matrix for reflection across the y-axis is an identity matrix with the x-multiplier negated:
[tex]\left[\begin{array}{cc}-1&0\\0&1\end{array}\right][/tex]
Multiplying the coordinates by this gives ...
[tex]\left[\begin{array}{cc}-1&0\\0&1\end{array}\right]\cdot\left[\begin{array}{ccc}-1&8&4\\7&1&-5\end{array}\right]=\left[\begin{array}{ccc}1&-8&-4\\7&1&-5\end{array}\right][/tex]
That is, the reflected points are G'(1,7), H'(-8,1), I'(-4,-5).
Answer:
G'(1,7), H'(-8,1), I'(-4,-5)
Step-by-step explanation:
right answer on edge2020
