MISSION: find the exact slope of spock’s eyebrows
The slope of Spock’s RIGHT eyebrow is -1/2. The slope of his left eyebrow is +1/2. Or we could sum it up by saying the equation of Spock’s eyebrows is |x/2| (assuming the bridge of his nose marks the line x=0).
Incorrect: His face is at an angle in that image and therefore nullifies that answer.