While relaxing on his front porch, Edwin notices a garden snail crawling on the sidewalk. Edwin is amazed at how slowly the snail moves, so he starts timing it.
There is a proportional relationship between the amount of time (in minutes) that Edwin
spends timing the snail, x, and the distance (in feet) that the snail moves, y.

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

$4034.40

the perimeter of the field is the sum of the lengths of the four sides:

47 yd + 158 yd + 47 yd + 158 yd = 410 yd

the cost of 3 ft (1 yd) of fence is 3×$3.28 = $9.84.

so the cost of jake's wood perimeter fance is

(410 yd) × ($9.84 /yd) = $4034.40