The lines below are perpendicular. If the slope of the green line is 2/3, what is

the slope of the red line?

-3/2

Step-by-step explanation:

Perpendicular lines have slopes that are "negative reciprocals" of each other. This just means you flip them and make them negative. so 3/4 would become - 4/3. i also want to add 1/2 would become - 2/1 so - 2 and a whole number like - 3 would become 1/3, because I know that can be tricky. just know you can write a whole number a as a/1 to make it a fraction.

So 2/3 becomes - 3/2 for perpendicular line.