Find the constant of proportionality, k = y/x.
x1245y361215
Unit rate from tables · grades 6–7
Constant of Proportionality from Tables
Generate focused practice for finding k in y = kx from equivalent-ratio tables. Every row is constructed from one whole-number unit rate, so k is never inferred from rounding.
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Constant of Proportionality
Find k from tables · Small whole numbers · Seed 261501
Find the constant of proportionality, k = y/x.
x2345y8121620
Find the constant of proportionality, k = y/x.
x2345y46810
Find the constant of proportionality, k = y/x.
x1345y26810
Find the constant of proportionality, k = y/x.
x1235y36915
Find the constant of proportionality, k = y/x.
x2345y10152025
Find the constant of proportionality, k = y/x.
x1235y5101525
Find the constant of proportionality, k = y/x.
x1345y391215
Find the constant of proportionality, k = y/x.
x1245y24810
Find the constant of proportionality, k = y/x.
x1345y6182430
No fake precision: tables, graph points, equations, and double number lines come from the same exact whole-number constant of proportionality. Better Buy problems compare integer cents per item, so a winner is never chosen from a rounded display value.
Teaching note 1
Divide y by x to find k, then check it against a different row.
Teaching note 2
The constant of proportionality is also the unit rate: the y-value when x equals 1.
Teaching note 3
When a table starts at x = 2 or x = 3, division still reveals the per-one value.
Move among tables, equations, graphs, double number lines, and Better Buy decisions in one exact generator.
Return to ratio foundations →Practice simplified ratios, equivalent tables, unit rates, proportions, and percent proportions.
Frequently asked questions
Is k always an integer here?
Yes. This focused version uses whole-number k values so the lesson tests proportional structure, not fraction division.
Why check a second row?
A second check prevents students from treating one pair as proof when the full table might not be proportional.