Dani uses the table to her convert measurements when she is sewing table is feet to yards 3-1 a. describe the relationship between the number of feet and the number of yards b. write an expression for the number of yards in f feet c. find the number of yards in 63 feet

The first thing we should do is see what relationship we have:
 Table is feet to yards 3-1
 a. Describe the relationship between the number of feet and the number of yards
 That is to say:
 1Yarda = 3 feet
 b. Write an expression for the number of yards in f feet
 Let
 y = Yard
 f = feet
 We have the following expression for the conversion:
 y = (1/3) f
 c. Find the number of yards in 63 feet 
 For this case we must substitute in the expression found the value of f = 63.
 y = (1/3) f
 y = (1/3) (63)
 y = 21
 
 1Yarda = 3 feet
 y = (1/3) f
 y = 21

The answer to your question is 1/9

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