Question

A point X has coordinates (-1, -8). The point is reflected across the y-axis to form X' X' is translated over 4 to the right and up 6 to form X". What are the coordinates of X' and X" ?

Answer 1

X' ( 1 , -8 )

X'' ( 5,-2 )

Explanation:

Given:-

- Point X : ( -1 , -8 )

Find:-

The point is reflected across the y-axis to form X', X' ?

X' is translated over 4 to the right and up 6 to form X", X''?

Solution:-

- We will look at each transformation step-by-step.

- The first transformation is the reflection of point X ( -1 , -8 ) across y-axis. That is the reflected point X' will have the same y coordinate. The distance in units of point X from y-axis is reflected across with the same units on the opposite side. Hence, the transformed X' would be:

X ( -1 , -8 )

x = -1 , y = -8

x' = 1 , y' = -8

X' ( 1 , -8 )

- Now the reflected X' is shifted 4 units right and 6 units up. That is there is an increase in x' by 4 units and increase in y' by 6 units to get X'':

X' ( 1 , -8 )

x' = 1 , y' = -8

x'' = 1 + 4 = 5 , y'' = -8 + 6 = -2

X'' ( 5,-2 )