Find the constant of variation for the relationship f(x)= 40x.

a.
f(x)

b.
x

c.
20

d.
40

Constant of variation is 40

No he does not because he can only cover 12 square feet from 15 square feet which he will still need 3 more. this is because if 3×5=15 square feet and 15-12=3 which thats the answer