Question

Find the equation of the images of the following lines when the reflection

line is the y-axis
a. y = x - 4
b. y=8

Answer 1

a. y = - x - 4

b. y = 8

Explanation:

RULE :

reflecting a line of the linear equation ‘y = ax + b’ over the y-axis gives us

another line (image line) of equation ‘y = - ax + b’

………………………………………………………………………………

a.

Line : y = x - 4 after reflection becomes line : y = - x - 4

b.

Line : y = 8 after reflection becomes line : y = 8