What is the key characteristic of the graph of a proportional relationship?

It is a line that goes through the origin.

Explain how you can determine if a table of values represents a proportional relationship.

Check if the ratio between y and x is constant for all pairs of values in the table.

Grade 7th Grade · Math · 57 min· Rp7.3

I can identify proportional relationships from tables, graphs, and equations.

Khan Academy · 7:18

How to visually identify proportional relationships using graphs | 7th grade | Khan Academy

3 key concepts

1
A proportional relationship exists when the ratio between Y and X is always a constant number.
2
The graph of a proportional relationship is a line that goes through the origin.
3
If a graph is linear but does not go through the origin, it is not a proportional relationship.

12 questions · Multiple choice & Short answer

Quick comprehension check

“The points (2, 6) and (4, 12) are on a graph. Does this graph represent a proportional relationship? Explain why or why not.”

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