Answer:
Slope is rise over run
Step-by-step explanation:
How many do you go up over how many you go over.
Answer:
m = -1/3
Step-by-step explanation:
The slope of the line can be calculated using the slope formula.

Since this is the line with points AB, the slope of any line perpendicular to it will be -1/3. All perpendicular lines cross at a 90 degree angle and as such their slopes are the negative reciprocals of each other. This means 3 becomes -1/3.
<span>m perpendicular </span>= −<span><span>2/3</span></span>