Question

Slope of one dotted lines:
slope of the reflection line:​

Answer 1

Slope of dotted lines: 1

Slope of reflection line:​ -1

Explanation:

For the dotted lines, the rise up by one unit and run for one unit, thus their slopes are 1.

For the reflection line, it does the same thing as the dotted line, but instead of rising one unit, it goes down for one unit and runs for one unit, making its slope -1.