Create a free account now and get 3 full lessons, completely free. Get my 3 free lessons

Grade 7 maths · B.5 · Proportional relationships

Constant of proportionality from a graph point

The line goes through the origin, so divide the point's y by its x.

Loading a question…

See worked examples
  1. The graph of a proportional relationship is a straight line through (0, 0) and (4, 28). What is the constant of proportionality?

    Answer: 7

  2. The graph of a proportional relationship is a straight line through (0, 0) and (4, 24). What is the constant of proportionality?

    Answer: 6

  3. The graph of a proportional relationship is a straight line through (0, 0) and (2, 6). What is the constant of proportionality?

    Answer: 3

Tip: The line goes through the origin, so divide the point's y by its x.

Print a worksheet of this skill New questions and an answer key, free.

Up next

Print a free worksheet with answers (20 questions).

Practise without limits

Members practise as much as they like, every day, and get the printable packs and lessons too.