Does y=-4/5x represent a direct variation is yes, identify the constant of variation

Most likely yes... there is a problem in the way you asked your question ...

if the question is   then the answer is yes and the constant is -4/5's

If by some chance the actual question is   (you can not tell by the way y0u presented tis problem.. then the answer would be NO it would be "inverse" relation

Step-by-step explanation:

18

step-by-step explanation:

draw the shape and you will see that f and k are actually at adjacent vertices (points of the hexagon that are neighboring).   so find the distance between (1,2) and (4,2).   that is easy since (1,2) and (4,2) is just a vertical distance to count, which is 3.   it is a regular polygon which means all sides are congruent.   you have 6 sides (hexa) so multiply 6 by 3 to receive 18.