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First Year maths · B.4 · Proportional relationships

Constant of proportionality from a table with fractions

Pick any pair from the table and divide y by x.

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  1. This table shows a proportional relationship: x = 4, 6 and y = 10, 15. What is the constant of proportionality?

    Answer: 5/2

  2. This table shows a proportional relationship: x = 4, 10 and y = 18, 45. What is the constant of proportionality?

    Answer: 9/2

  3. This table shows a proportional relationship: x = 6, 10 and y = 48, 80. What is the constant of proportionality?

    Answer: 8

Tip: Pick any pair from the table and divide y by x.

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