How did the Yuan dynasty support and expand foreign trade? Choose four correct answers. O built more roads and bridges
O protected overland trade routes
O repaired and added to existing canals
O increased taxes on merchants and travelers
O formed groups of merchants to support caravans
O barred foreigners from entering Mongol and Chinese lands

1.4

2.3

step-by-step explanation:

the formula for the constant of variation is

y= kx

divide each side by x

y/x =kx/x

y/x =k

we know a and y

1.   y/x = k

4/1 =4

check the other values to make sure they are the same

8/2 = 4   12/3 =4   and 16/4 =4  

the constant of variation is 4

2.   y/x = k

3/1 =3

check the other values to make sure they are the same

6/2 = 3   9/3 =3   and 12/4 =3  

the constant of variation is 3

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step-by-step explanation:

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50x5=$250

step-by-step explanation:

if she was to only spend a dollar she can get 1lb

step-by-step explanation: