Is the function in the graph non-linear?
a) yes because it has constant rate of change
b) yes, because it does not have a constant rate of change
c) no, because it has a constant rate of change
d) no, because it does not have a constant rate of change

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.

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