The equation of line e is y = 3/5x + 1. The equation of line f is y = -8/3x + 9/8. Are line e and line f parallel or perpendicular?

I think they're neither perpendicular nor parallel

Explanation:

Not parallel since slope of e (3/5) isn't equal to slope of f (-8/3)

Not perpendicular since the product of their slopes isn't equal to - 1.

=> (3/5)(-8/3)= - 8/5 and not - 1

(plz make sure you typed the equations correctly.)

Hope this helps..