Question

Now reflect A'B'C" across the y-axis to create A " B" C". What are the new coordinates? (3 points)
1"00
B"
....
C"(

(the coordinates are A.1,5 b.9,5 c.7,2)

Answer 1

To reflect the points A, B, and C across the y-axis, we need to change the sign of the x-coordinates while keeping the y-coordinates the same. The new coordinates can be calculated as follows:

Given the original coordinates:
- A (1, 5)
- B (9, 5)
- C (7, 2)

We apply the reflection across the y-axis:

1. For point A (1, 5):
- A' = (-1, 5)

2. For point B (9, 5):
- B' = (-9, 5)

3. For point C (7, 2):
- C' = (-7, 2)

So, the new coordinates after reflection across the y-axis are:
- A'(-1, 5)
- B'(-9, 5)
- C'(-7, 2)

These are the coordinates for points A", B", and C" after the reflection.