Plz help me if you see this Quantity
0-20 pairs

21-40 pairs

41-60 pairs

61-80 pairs

81 or more pairs

Wholesale Price

(per pair)

$25.00 each

$23.00 each

$21.00 each

$19.00 each

$17.00 each

a) Write an equation that could be used to find the retail price for each range. How do you know the equation will work consistently for each range? plz help me if you see this