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 answer: 1Yarda = 3 feet y = (1/3) f y = 21
